上游原料
methyl (3aR,4R,5S,5aR,10bR,13aR)-4-(acetoxy)-3a-ethyl-9-[(13S,15S,17S)-17-ethyl-17-hydroxy-13-(methoxycarbonyl)-1,11-diazatetracyclo[13.3.1.0(4,12).0(5,10)]nonadeca-4(12),5,7,9-tetraen-13-yl]-5-hydroxy-8-methoxy-6-methyl-3a,4,5,5a,6,11,12,13a-octahydro-1H-indolizino[8,1-cd]carbazole-5-carboxylatemethyl (13S,15S,17S)-13-[(3aR,4R,5S,5aR,10bR,13aR)-3a-ethyl-5-(hydrazinocarbonyl)-4,5-dihydroxy-8-methoxy-6-methyl-3a,4,5,5a,6,11,12,13a-octahydro-1H-indolizino[8,1-cd]carbazol-9-yl]-17-ethyl-17-hydroxy-1,11-diazatetracyclo[13.3.1.0(4,12).0(5,10)]nonadeca-4(12),5,7,9-tetraene-13-carboxylate1-([(3aR,4R,5S,5aR,10bR,13aR)-3a-Ethyl-9-[(13S,15S,17S)-17-ethyl-17-hydroxy-13-(methoxycarbonyl)-1,11-diazatetracyclo[13.3.1.0(4,12).0(5,10)]nonadeca-4(12),5,7,9-tetraen-13-yl]-4,5-dihydroxy-8-methoxy-6-methyl-3a,4,5,5a,6,11,12,13a-octahydro-1H-indolizino[8,1-cd]carbazol-5-yl]carbonyl)-1,2-triazadien-2-iumethyl (2S)-2-amino-3-(1H-indol-3-yl)propanoate(3aR,4R,5S,5aR,10bR,13aR)-3a-Ethyl-9-[(13S,15S,17S)-17-ethyl-17-hydroxy-13-(methoxycarbonyl)-1,11-diazatetracyclo[13.3.1.0(4,12).0(5,10)]nonadeca-4(12),5,7,9-tetraen-13-yl]-4,5-dihydroxy-8-methoxy-6-methyl-3a,4,5,5a,6,11,12,13a-octahydro-1H-indolizino[8,1-cd]carbazole-5-carboxylic acidmethyl (13S,15S,17S)-13-[(3aR,4R,5S,5aR,10bR,13aR)-5-([[(1S)-2-ethoxy-1-(1H-indol-3-ylmethyl)-2-oxoethyl]amino]carbonyl)-3a-ethyl-5-hydroxy-4-[(isobutoxycarbonyl)oxy]-8-methoxy-6-methyl-3a,4,5,5a,6,11,12,13a-octahydro-1H-indolizino[8,1-cd]carbazol-9-yl]-17-ethyl-17-hydroxy-1,11-diazatetracyclo[13.3.1.0(4,12).0(5,10)]nonadeca-4(12),5,7,9-tetraene-13-carboxylate1-[(Chlorocarbonyl)oxy]-2-methylpropane; Isobutyl chloroformate;isobutyl carbonochloridate
