Synonyms: Alkaloid GB9 (8CI); Himbosan-18-oic acid, 16-(acetyloxy)-20-hydroxy-14-methoxy-, methylester, (14a,16a)-;5,6,9-[1]Butanyl[4]ylidene-5H-benz[6,7]indeno[7a,1-b]pyrrole-10-carboxylic acid,11-(acetyloxy)-1,2,3,4,4a,6,7,7a,8,9,11,11a-dodecahydro-9-hydroxy-1-methoxy-15-methyl-,methyl ester, [1R-(1a,4ab,4bS*,5a,6a,7ab,9a,11aa,12R*,15R*)]-