3-{(3S,4S)-2-[1-[5-Formyl-4-(2-methoxycarbonyl-ethyl)-3-methoxycarbonylmethyl-1H-pyrrol-2-yl]-meth-(Z)-ylidene]-5-methoxy-4-methoxycarbonylmethyl-4-methyl-3,4-dihydro-2H-pyrrol-3-yl}-propionic acid methyl ester 、 2-[(S)-5-[1-[5-tert-Butoxycarbonyl-4-(2-methoxycarbonyl-ethyl)-3-methoxycarbonylmethyl-1H-pyrrol-2-yl]-meth-(Z)-ylidene]-3-(2-methoxycarbonyl-ethyl)-4-methoxycarbonylmethyl-4-methyl-pyrrolidin-2-ylidene]-malonic acid di-tert-butyl ester 生成 Sirohydrochlorin octamethyl ester (3-epimer) 、 Sirohydrochlorin octamethyl ester 、 Sirohydrochlorin octamethyl ester (8-epimer)