1,6-bis[(1S,10R)-1-(10-chlorethyl)-5-(2,3,4,6-tetra-O-acetyl-β-D-galactopyranosyl)-1,2-dihydro-3H-benz[e]indol-3-yl]hexan-1,6-dione                                                                                                                                                              在
                                                                                                                                                                                 
sodium methylate                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
甲醇                                                                                  为溶剂,
                                                                                                                                                                                        以43.9 mg的产率得到(-)-1,6-bis[(1S,10R)-1-(10-chlorethyl)-5-(β-D-galactopyranosyl)-1,2-dihydro-3H-benz[e]indol-3-yl]hexan-1,6-dione