(+)-{(1S,10R)-1-(10-chloroethyl)-3-[(5-(2-N,N-dimethylaminoethoxy)-indol-2-yl)-carbonyl]-5-hydroxy-1,2-dihydro-3H-benz[e]indole hydrochloride}   、                                                                                      
N-methyl-N-[4-(2,3,4,6-tetra-O-acetyl-β-D-galactopyranosyl)-3-nitrobenzyl-oxycarbonyl]-2-aminoethanol-carbonyl-chloride                                                                                                                                                              在
                                                                                                                                                                                 
4-二甲氨基吡啶                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
N,N-二甲基甲酰胺                                                                                  为溶剂,
                                                                                                                                                    反应 4.0h,
                                                                                                                以27%的产率得到[(2R,3S,4S,5R,6S)-3,4,5-triacetyloxy-6-[4-[[2-[[(1S)-1-[(1R)-1-chloroethyl]-3-[5-[2-(dimethylamino)ethoxy]-1H-indole-2-carbonyl]-1,2-dihydrobenzo[e]indol-5-yl]oxycarbonyloxy]ethyl-methylcarbamoyl]oxymethyl]-2-nitrophenoxy]oxan-2-yl]methyl acetate