O-(6-methoxycarbonyl-2-pyridylmethyl)hydroxylamine 、 2,10-dihydroxy-12-((2R,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)-12,13-dihydrofuro[3,4-c]indolo[2,3-a]carbazole-5,7-dione 在
三乙胺 作用下,
以
甲醇 为溶剂,
生成 methyl 6-[[6,20-dihydroxy-12,14-dioxo-3-[(2R,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]-3,13,23-triazahexacyclo[14.7.0.02,10.04,9.011,15.017,22]tricosa-1,4(9),5,7,10,15,17(22),18,20-nonaen-13-yl]oxymethyl]pyridine-2-carboxylate