重氮甲烷 、
17,18-Didesoxy-6,7,19,20-tetrahydro-17,18-seco-aspochalasin-D-disaeure-dimethylester 生成
(14S)-14-hydroxy-10-isopropyl-14-methyl-1,21-dioxo-(6ξH)-17,18-seco-[11]cytochalasane-17,18-dioic acid 17-lactone 18-methyl ester 、 (14
R)-14-hydroxy-10-isopropyl-14-methyl-1,21-dioxo-(6ξ
H)-17,18-seco-[11]cytochalasane-17,18-dioic acid 17-lactone 18-methyl ester