Trimyristin--d 15 is the deuterium labeled Trimyristin. Trimyristin, an active molluscicidal component of Myristica fragrans Houtt, significantly inhibits acetylcholinesterase ( AChE ), acid and alkaline phosphatase (ACP/ALP) activities in the nervous tissue of Lymnaea acuminata. IC50s of Trimyristin against AChE , ACP, and ALP are 0.11, 0.16 and 0.18 mM, respectively.