[(2S,3S,4S,6R)-6-[[(1S,3R)-8-acetyloxy-3-ethyl-3,12-dihydroxy-4,6,11-trioxo-1,2-dihydrotetracen-1-yl]oxy]-2-methyl-4-[(2,2,2-trifluoroacetyl)amino]oxan-3-yl] 4-nitrobenzoate 在
溶剂黄146 sodium hydroxide 、 sodium tetrahydroborate 、
聚合甲醛 、 sodium cyanoborohydride 作用下,
以
1,4-二氧六环 、
甲醇 、
苯 为溶剂,
生成
(7S,9R,10R)-7-[(2R,4S,5S,6S)-4-(dimethylamino)-5-hydroxy-6-methyloxan-2-yl]oxy-9-ethyl-6,9,10-trihydroxy-2-methoxy-8,10-dihydro-7H-tetracene-5,12-dione