abstract |
Provided is a novel method for producing withanolides. The following formula (2) (Wherein R 1 and R 2 are a hydrogen atom, a methyl group, etc., R 3 and R 4 are a hydrogen atom or a hydroxyl group; a hydrogen atom or a hydroxyl group is meant; R 5 is a hydroxyl group, a sugar chain, etc. Or a salt thereof. [Selection figure] None |