31148-61-5

Spiro[1H,15aH-furo[2',3':7,8]indolizino[8,1-cd]carbazole-2(2aH),6'(7'H)-[4H,5H,15aH,16H]furo[2',3':7,8]indolizino[8,1-cd]pyrido[1,2,3-lm]carbazole]-7-carboxylicacid, 2',3',4,4'a,5,6,8,12'c,13,13',14,14',17',17'a-tetradecahydro-9'-methoxy-,methyl ester, (2