2H-3,7-Methanoazacycloundecino(5,4-b)indole-9-carboxylic acid, 9-((2-beta,3-beta,4-beta,5-alpha,12-beta,19-alpha)-4-(acetyloxy)-3'-(2-chloroethyl)-6,7-didehydro-16-methoxy-1-methyl-2',4'-dioxospiro(aspidospermidine-3,5'-oxazolidin)-15-yl)-5-ethyl-1,4,5,6,7,8,9,10-octahydro-5-hydroxy-, methyl ester, (3R-(3R*,5S*,7R*,9S*))-