Ensysce Biosciences, Inc.

Good morning and welcome to the Insights Biosciences, Inc. corporate update call. As a reminder, this conference is being recorded. Your hosts today are Dr. Lynn Kirkpatrick, Chief Executive Officer, Dr. Bill Smith, Chief Medical Officer, and Dave Humphrey, Chief Financial Officer. Before we begin the formal presentation, I would like to remind everyone that statements made on the call and webcast may include predictions, estimates, or other information that might be considered forward-looking. While these forward-looking statements represent our current judgment on what the future holds, they are subject to risks and uncertainties that could cause actual results to differ materially. You are cautioned not to place undue reliance on these forward-looking statements, which reflect our opinions only as of the date of this presentation. Please keep in mind that we are not obligating ourselves to revise or publicly release the results of any revision to these four looking statements in light of new information or future events. Throughout today's discussion, we will attempt to present some important factors relating to our business that may affect our predictions. You should also review our most recent forms 10Q and 10K for a more complete discussion of these factors and other risks, particularly under the heading risk factors. At this time, I'd like to turn the call over to Chief Executive Officer, Dr. Lynn Kirkpatrick. Lynn?

Thank you, Operator, and good morning, everyone. Thank you for joining us. I am pleased to welcome you to today's Corporate Update Conference Call. Before I get into the full background on the company, I want to restate our mission and highlight three major achievements that have moved Ensise forward in the last year. We're still losing over 200 Americans every day to opioid overdose, yet we also have countless Americans with severe pain who cannot get access to their prescriptions. I believe this is unacceptable, and the NCIFE team believes we have a solution to reduce this crisis. The three key points that we achieved this year are pivotal to our long-term success. Firstly, strong efficacy. Our bioequivalent study demonstrated that PF614 will deliver powerful pain relief equivalent to OxyContin. Secondly, less abuse. Our two human abuse potential studies were successful and demonstrated that PF614 is not attractive to individuals who may seek to abuse opioids. And thirdly, less overdoses. Our PF614 MPAR study demonstrated that this unique platform works and can deliver the first-ever product that may prevent overdose if too many pills are taken. In the next few minutes, I'll expand on this data, but the important takeaway is we have the first product with strong efficacy, lower abuse, and overdose protection. This is a real breakthrough that we believe could save many lives. For those of you new to our story, we are a clinical stage company using sophisticated chemistry to improve drug safety and performance. Our technology platforms, TAP and MPAR, are designed to improve delivery and reduce abuse and overdose of prescription drugs. with the goal of creating new classes of prescription medicines that are intended to be both powerful and safe. Our first endeavor is to bring to market the next generation of analgesics for the treatment of severe pain. I will review our two technology platforms and then explain our clinical trial progress over the last year. 2022 was a year in which we made important progress across all of our clinical development programs, accomplishing key milestones that further advance our two lead programs. We are highly focused on positioning our technology platforms, TAP and MPAR, opioid abuse deterrent and overdose protection programs as next generation opioid products. TAP stands for Trypsin Activated Abuse Protection. In simple terms, It is a chemical modification that makes a drug inactive until it's swallowed and reaches the small intestine where it's exposed to the natural enzyme trypsin. Trypsin, which is only found in the small intestine and responsible for digesting the proteins and meats we eat, starts the activation process to release the free opioid. In other words, our tap products are activated or turned on through normal digestive processes in our own bodies. The subsequent rate of release is further designed into the chemistry which determines either an immediate or extended release profile. We refer to TAP as sophisticated chemistry since it limits opioid release to oral administration and it determines how quickly or slowly a drug is released. TAP can be applied to most types of medicines to either make them safer or actually perform better. Our second technology platform, MPAR, stands for Multi-Pill Abuse Resistance. MPAR is a smart overdose protection technology, an industry first. It is designed to be combined with our TAP pro drugs to prevent patients or abusers from overdosing. MPAR turns off the release of the active ingredient in an overdose situation. This protection from oral overdose is designed to activate only when more than the prescribed dose is taken. As mentioned, we've applied these transformative technologies initially to opioid products to produce the next generation analgesics to treat severe pain. Now I stress severe pain, which is what a potent opioid like oxycodone should be indicated for. There are many types of pain where opioids are not appropriate and hence not the focus of our current programs. We know that controlling severe pain appropriately may prevent someone from developing chronic pain and requiring opioids long-term. As I said, these medications are used to treat severe pain when other therapies are contraindicated or likely to be ineffective, as per the recent updated CDC guidelines for the clinical practice of prescribing opioids. We do know that in certain circumstances, such as severe traumatic injuries or invasive surgeries, where having pain is inevitable, and controlling pain is the role of our lead product, PF614. We also know that overly broad opioid use has led to the current opioid crisis, yet our TAP and MPAR technologies have been developed to address and reduce both abuse and overdose of these prescription pain products. This is something that other marketed abuse deterrent formulations of opioids have failed to achieve. We believe these two technologies can give both patients and prescribers, more confidence in their medicine's safety. Although we are focusing on developing our lead product, PF614, please remember that both TAP and MPAR can be applied to many more prescription drugs, therefore for providing us with ongoing opportunities. As our pipeline shows, we have applied TAP chemical modification to a number of opioids, as well as drugs to treat ADHD, and we have a discovery program focused on novel TAP agents for treating opioid use disorder. Now, let me update you on our lead program, PF614, an oxycodone TAP product which is designed to replace OxyContin in the marketplace. PF614 has received fast-track status for use in chronic pain from the FDA, demonstrating that the agency feels PS614 may fulfill an unmet therapeutic need. During 2022, we initiated three clinical studies to advance PS614 through development. I could not be prouder of the work our team has achieved. With the successful completion of these three trials, we are now positioned with a growing safety database that allows us to move to an end-of-Phase II meeting with the FDA to discuss our Phase III plans and to map out the last steps to commercialization. All three studies conducted over the last year delivered positive data in line with our ambitious target profile. In July, we announced positive data from the study PF614-102 that directly compared PF614 to OxyContin, four bioequivalents. For those unfamiliar, bioequivalence is the clinical comparison of two dosage-borne or active ingredients showing that they provide similar blood concentrations, therefore resulting in the same therapeutic effect. With a positive measure of bioequivalence, a product may use the shortened 505B2 regulatory pathway to commercialization, potentially saving time and cost. In our oral bioequivalent study, PF614 was found to deliver oxycodone at the same rate and level as did OxyContin. However, the important advantage observed for PF614 is its longer half-life, meaning the pain relief should last longer than OxyContin. The data support our hypothesis that PF614 should be a true twice-a-day pain medication, which is a major patient benefit. Additionally, we believe PF614 has superior abuse deterrent properties and ultimately with MPAR can be launched as the first ever opioid analgesic with overdose protection. We believe the data will support our goal of PF614 replacing OxyContin in the marketplace. We also expect the positive data from this study will support the 505 regulatory path for clinical development of PF614, reducing time to launch. We also initiated two human abuse potential studies to evaluate how well recreational drug users like PF614 versus oxycodone when crushed and inhaled or just taken orally. These HAP studies are required to support abuse deterrent labeling upon final approval of PF614. HAP studies are conducted to determine if a new opioid has less abuse potential both orally through crushing or chewing and nasally by inhaling or snorting compared to traditional opioid products. During 2022, we reported that our nasal study, PF614-103, was very successful. Inhaled PF614 had significantly reduced drug liking when compared to inhaled crushed immediate release oxycodone. Overall, the data means that drug users did not like PF614 and would not take drug again due to an inability to abuse by snorting, unlike the oxycodone comparator. in October received guidance from the FDA that an acute pain indication may be appropriate for PF614. While not binding, the guidance is encouraging and states that our proposed clinical development approach of conducting two well-controlled trials in two different pain models with appropriate controls appeared to be reasonable to support a new drug application or PF614 for an acute pain indication. This guidance is important as it provides us with a shortened development path for an acute pain indication that may be filed for approval much earlier than approval for chronic pain indications. The FDA advice letter also provided additional guidance with respect to nonclinical studies in addition to the clinical trials we have planned. As a result of the FDA guidance, we are moving forward with clinical trials to support PF614 for acute pain, such as post-surgical pain, while we also continue our chronic pain development program. We believe the longer half-life of PF614 compared to OxyContin may better control severe pain on a day-to-day basis, ultimately preventing acute pain from becoming chronic. Additionally, in late 2022, we initiated and completed enrollment of a second HAP study, PF614-104, comparing oral administration of PF614 to oxycodone and placebo. Recently, we announced positive results from this study, meeting both our primary and secondary endpoints. We successfully showed PF614 had significantly lower drug liking and take drug again scores than the comparator oxycodone tablets. Further, the data from this clinical trial showed that PF614, even at doses doubled that of oxycodone, did not increase its abuse potential. We believe these data We're the result of PF614 taking a longer time to reach maximum blood levels, a feature that cannot be changed by manipulating through crushing or chewing. Lastly, I want to stress our programs are protected by a global patent portfolio of over 100 patents issued in 25 countries, ensuring an opportunity to address the need for safer pain medication globally. We have built a strong team to assist in achieving the milestones we have set for each program, and we now have a goal of advancing our lead products through the last stages of clinical development in an attempt to bring our lead programs to market as quickly as possible. Now I'm pleased to turn over the call to Dr. Bill Schmidt, our Chief Medical Officer. Bill is very experienced in analgesic drug development and will discuss in more detail the recently reported positive data from our second HAP clinical study, PF614-104.

Bill? Thank you, Lynn. It's wonderful to be here this morning to discuss the continued progress we are making with our clinical program for the development of PF614. I have worked in analgesic drug development throughout my career, and I'm very excited about the new data NCISE just reported. We have developed a new generation of opioid analgesics, which promises strong efficacy with less abuse and less overdose potential, something that industry and society really needs. Our goals in the last year were, as Lynn described, mission critical in demonstrating that PF614 was not only effective but also unattractive to people who may seek to abuse opioids. I would like to begin by outlining the PF614-104 Oral Human Abuse Potential Study. Human abuse potential or HAP studies are required by the FDA to demonstrate that a drug with a potential for abuse has fewer desirable features than traditional opioid products used by recreational drug users. In other words, we want our drug products to be effective for moderate to severe pain, but not like to the same extent as other oxycodone containing products by recreational users. The PF614-104 study examined PF614 for these features of liking. The primary measure was maximum drug liking by the subjects, and the secondary measure was whether the subjects felt they wanted to take drug again. These features of PF614 were rated on a 100-point scale using a visual analog or VAS scale that measures both desirable and undesirable drug effects. For our oral HAP study, we compared three doses of PF614 capsules to a 40 milligram tablet of immediate release oxycodone and to placebo by pre-qualified recreational drug users who know how to recognize opioid drugs. We recently announced the main results from the study, which showed that PF614 has a significantly lower peak drug liking and significantly less appeal to take drug again, than the comparator oxycodone tablets. Our study was done in 28 non-dependent recreational drug users who typically used oxycodone or other opioid drugs to get high 10 or more times in the past year. These data are very important in establishing that we have an effective agent with the appropriate protection to discourage any abuse in the dose range which we intend to launch. Study subjects were previously qualified to assure that they could recognize a reference 40 milligram oxycodone tablet as something that they considered desirable or liked. The test subjects then received each of the five following treatments in a complete crossover fashion. There was one treatment in each of five treatment periods with a five-day or longer washout period in between each. The test drugs were administered in a randomized, double-blind manner, meaning neither the subject nor the person administering the treatment knew which one they were getting, following a fasting period of at least eight hours. In each test period, the subjects received either a PF614 50, 100, or 200 milligram capsule, or oxycodone HCL, immediate release, 40 milligram capsule, which was over-encapsulated to look identical to PF614 100 milligrams, which it was equivalent to, or a placebo capsule. These were taken orally, and then over a 24-hour period, each subject was asked a number of questions to rate how much they liked each test product. The primary measure was maximum effect, or Emax, for drug liking. This measure, which is known to correlate with a drug's potential for abuse, is the primary endpoint recommended by the FDA in their guidance on assessment of abuse potential of drugs. For the second measure, subjects were also asked to rate whether they liked the drug enough to want to take it again. Specifically, the primary endpoint for the study, drug liking at this moment, was measured at time periods up to 24 hours after dosing using the 100-point VAS scale. TF614 produced statistically lower effects than oxycodone at the lowest dose, P is less than 0.0001, and statistically significant overall drug liking at both the low and the mid doses, P is less than 0.0001 and P equals 0.0025, respectively. TF614 took a significantly longer median time to reach Emax for drug liking than and oxycodone at all three dose levels, which is highly important for reducing drug abuse. Similar findings were noted with the second endpoint we evaluated, where we asked each subject if they liked the drug enough to want to take drug again. The secondary endpoint was met at both the low and mid dose of PF614 with highly significant values of P is less than 0.001 and P equals 0.0038, respectively. and was numerically lower than comparator even at double the dose, demonstrating that recreational users would be less motivated to abuse PF614 compared to immediate release oxycodone. The study was an important step in establishing that unlike the current opioid analgesics on the market, which can be manipulated and abused to release higher concentrations of opioids more quickly through chewing or crushing to defeat the time-release formulation, PF614 was has a much lower risk of showing a favorable liking score by recreational drug users. Remember, the time release features of PF614 cannot be altered by these means. The study supports our hypothesis that the very low liking scores for PF614 should reduce the risk of misuse, abuse, and diversion through oral administration. I want to also note that the FDA previously excused us from having to do intravenous abuse liability studies since PF614 will never see trypsin in the blood and hence will never be converted to oxycodone if injected for purposes of recreational drug use. As Lynn said before, the only way to activate our TAP prodrugs is to take them orally and allow normal digestive processes to initiate the activation cycle. I want to reiterate why these HAP studies are important milestones. They are key for gaining approval and to position PF614 as a new class of opioid when it enters the market. We believe that PF614 will offer a better solution to treat severe pain with less risk of abuse and overdose. I will now turn the call back over to Lynn.