Synonyms: Alkaloid GB5 (8CI); Himbosan-18-oic acid, 20-(acetyloxy)-13,14,16-trihydroxy-, methylester, (13a,14a,16a)-;5,6,9-[1]Butanyl[4]ylidene-5H-benz[6,7]indeno[7a,1-b]pyrrole-10-carboxylicacid,9-(acetyloxy)-1,2,3,4,4a,6,7,7a,8,9,11,11a-dodecahydro-1,2,11-trihydroxy-15-methyl-,methyl ester, [1S-(1a,2a,4ab,4bS*,5a,6a,7ab,9a,11aa,12S*,15S*)]-