2673-40-7 4-Demethyl-3-oxovobasan-17-oic acid methyl ester AIDS-002671 AIDS002671 Indole alkaloid;2,6-Methano-1H-azecino[5,4-b]indole-14-carboxylic acid, 5-ethylidene-2,3,4,5,6,7,8,9-octahydro-8-oxo-, methyl ester Perivine Vobasan-17-oic acid, 4-demethyl-3-oxo-, methyl ester