Desacetylanhydro-α-naphthocyclinonsaeure-methylester 在
重氮甲烷 、
盐酸 作用下,
生成
(1S,3R)-3,4,6,9-Tetrahydro-10-hydroxy-1-methyl-6,9-dioxo-1H-naphtho<2,3-c>pyran-3-essigsaeure-methylester 、
(10-Hydroxy-1-methyl-6,9-dioxo-3,4,6,9-tetrahydro-1H-benzo[g]isochromen-3-yl)-acetic acid methyl ester 、 (1S,3R)-3,4,6,7,8,9-Hexahydro-10-hydroxy-1-methyl-6,9-dioxo-1H-naphtho<2,3-c>pyran-3-essigsaeure-methylester 、 (1R,3R)-3,4,6,7,8,9-Hexahydro-10-hydroxy-1-methyl-6,9-dioxo-1H-naphtho<2,3-c>pyran-3-essigsaeure-methylester