乙酸酐 、 methyl (4E,8E)-11-[(2S)-3,3-dimethyloxiran-2-yl]-5,9-dimethyl-2-(3-oxo-3-pyridin-3-ylpropanoyl)undeca-4,8-dienoate 生成
pyripyropene E 、 Acetic acid (3S,4aR,6aS,12aS,12bS)-4,4,6a,12b-tetramethyl-11-oxo-9-pyridin-3-yl-1,3,4,4a,5,6,6a,12,12a,12b-decahydro-2H,11H-7,10-dioxa-benzo[a]anthracen-3-yl ester