105661-07-2 methyl (2beta,3beta,4beta,5alpha,19alpha)-4-(acetyloxy)-15-[(6S,8S)-4-ethyl-8-(methoxycarbonyl)-1,3,6,7,8,8a,9,13b-octahydro-2,6-methanoazecino[4,3-b]indol-8-yl]-3-hydroxy-16-methoxy-1-methyl-6,7-didehydroaspidospermidine-3-carboxylate 2,3-dihydroxybutane