Synonyms: Pycnanthinine(8CI); (+)-Pycnanthinine;7H,18H-7a,17-Ethano-14,18-methano-1H,4H-[1,4]diazocino[1'',2'':1',2']indolo[2',3':4,5]pyrido[3,2,1-jk]indolizino[8,1-cd]carbazole-13-carboxylicacid, 3a-ethyl-15-ethylidene-3a,5,5a,13,14,15,16,22,23,24a-decahydro-, methylester, [3aR-(3aa,5ab,7aa,13a,14b,15E,17a,18b,18aR*,21bS*,24aa)]-; [3aR-(3aa,5ab,7aa,13a,14b,15E,17a,18b,18aR*,21bS*,24aa)]-Methyl3a-ethyl-15-ethylidene-3a,5,5a,13,14,15,16,22,23,24a-decahydro-7H,18H-7a,17-ethano-14,18-methano-1H,4H-[1,4]diazocino[1'',2'':1',2']indolo[2',3':4,5]pyrido[3,2,1-jk]indolizino[8,1-cd]carbazole-13-carboxylate