乙酸酐 、 Acetic acid (2S,4aR,10bR)-2,9-diacetoxy-4a-hydroxy-8-isopropyl-4,4,10b-trimethyl-6-oxo-1,2,3,4,6,10b-hexahydro-4aH-benzo[c]chromen-10-yl ester 以
吡啶 为溶剂,
生成
Acetic acid (2R,4aR,10bS)-2,9,10-triacetoxy-8-isopropyl-4,4,10b-trimethyl-6-oxo-1,2,3,4,6,10b-hexahydro-benzo[c]chromen-4a-yl ester