乙酸酐 、
Acetic acid (11E,13E)-(4R,5R,6S,7R,9R,16R)-7-[1,3]dioxolan-2-ylmethyl-6-hydroxy-5-methoxy-9,16-dimethyl-2,10-dioxo-oxacyclohexadeca-11,13-dien-4-yl ester 在
吡啶 作用下,
反应 14.0h,
生成 Acetic acid (11E,13E)-(4R,5S,6S,7R,9R,16R)-4-acetoxy-7-[1,3]dioxolan-2-ylmethyl-5-methoxy-9,16-dimethyl-2,10-dioxo-oxacyclohexadeca-11,13-dien-6-yl ester