cyclotagitinin C 在
对甲苯磺酸 、
间氯过氧苯甲酸 作用下,
以
二氯甲烷 为溶剂,
生成
Isobutyric acid (4aS,7aR,8R)-4-acetyl-9a-methyl-7-methylene-2,6-dioxo-decahydro-1,5-dioxa-cyclopenta[f]azulen-8-yl ester 、 Isobutyric acid (3aR,4R,9bS)-9a-acetyl-6-hydroxy-6-methyl-3-methylene-2,8-dioxo-decahydro-cyclohepta[2,1-b;3,4-b']difuran-4-yl ester