5-Acetylamino-6-(8-chloro-5-methoxy-4-oxo-1,2,3,4-tetrahydro-naphthalen-2-ylmethyl)-4-hydroxy-2-oxo-cyclohex-3-ene-1,3-dicarboxylic acid dimethyl ester 在
sodium hydride 作用下,
生成 (4aS,5aS)-4-Acetylamino-7-chloro-3,12-dihydroxy-10-methoxy-1,11-dioxo-1,4,4a,5,5a,6,11,11a-octahydro-naphthacene-2-carboxylic acid methyl ester