Synonyms [1- [(1- methyl- 2- piperidinyl)methyl]- 1H- indol- 3- yl]- 1- naphthalenyl- methanone. cannabinoid drugs AM1220 is a potent synthetic?cannabinoid?(CB) with preference for the central CB1?receptor (Ki?= 3.88 nM) over the CB2?receptor (Ki?= 73.4 nM). 1 ?The physiological actions and metabolism of AM1220 have not been?characterized. cannabinoid drugs