Chemical Name: (2β,3β,4β,5α,12R,19α)-4-(acetyloxy)-6,7-didehydro-15-[(2S,4RS,6S,8S)-4-ethyl-1,3,4,5,6,7,8,9-octahydro-8-(methoxycarbonyl)-2,6-methano-2H-azecino[4,3-b]indol-8-yl]-3-hydroxy-16-methoxy-1-methylaspidospermidine-3-carboxylic Acid Methyl Ester Ditartarate