聚合甲醛 、
(5aR,6aR,7R,10aR)-7-Amino-1,8,10a,11-tetrahydroxy-10,12-dioxo-6,6a,7,10,10a,12-hexahydro-5aH-5-thia-naphthacene-9-carboxylic acid amide; hydrochloride 在
sodium cyanoborohydride 作用下,
以
四氢呋喃 为溶剂,
以62%的产率得到(5aR,6aR,7R,10aS)-7-(dimethylamino)-1,10,10a,12-tetrahydroxy-8,11-dioxo-5a,6,6a,7-tetrahydrobenzo[b]thioxanthene-9-carboxamide