9-Hydroxy-8-methoxy-6-methoxycarbonylmethyl-9H-tribenzo[a,c,e]cycloheptene-7-carboxylic acid methyl ester 、
Methyl-9-bromo-3-oxononanoat 生成 6-[9-Hydroxy-8-methoxy-7-(4-methoxycarbonyl-3-oxo-butyryl)-9H-tribenzo[a,c,e]cyclohepten-6-yl]-3,5-dioxo-hexanoic acid methyl ester