137848-36-3 4-[({[2-({(2beta,3beta,4beta,5alpha,19alpha)-15-[(5S,7R,9S)-5-ethyl-5-hydroxy-9-(methoxycarbonyl)-1,4,5,6,7,8,9,10-octahydro-2H-3,7-methanoazacycloundecino[5,4-b]indol-9-yl]-3,4-dihydroxy-16-methoxy-1-methyl-6,7-didehydroaspidospermidin-3-yl}carbonyl)hydr