nantenine nantenine nantenine is an alkaloid found in the plant nandina domestica as well as some corydalis species. it is an antagonist of both the α1-adrenergic receptor and the serotonin 5-ht2a receptor, and blocks both the behavioral and physiological effects of mdma in animals. nantenineclinical dataatc codenoneidentifiers iupac name (s)-1,2-dimethoxy-6-methyl-5,6,6a,7-tetrahydro-4h-benzobenzodioxoloquinoline cas number2565-01-7 ypubchem cid197001chemspider170619 nuniixe0au8c122chemblchembl467094 ncomptox dashboard (epa)dtxsid70180343 chemical and physical dataformulac20h21no4molar mass339.391 g·mol−13d model (jsmol)interactive image smiles cn1ccc2=cc(=c(c3=c21cc4=cc5=c(c=c43)oco5)oc)oc inchi inchi=1s/c20h21no4/c1-21-5-4-11-7-17(22-2)20(23-3)19-13-9-16-15(24-10-25-16)8-12(13)6-14(21)18(11)19/h7-9,14h,4-6,10h2,1-3h3/t14-/m0/s1 nkey:wsvwkhtvfgttkj-aweznqclsa-n n ny (what is this?) (verify)