(2R,3R,5R,6S,7S*)-2,6-Dibenzyloxy-3-(tert-butyldimethylsiloxy)-7-hydroxy-5-(p-methoxybenzyloxy)-4,4-dimethylcyclooctanone 生成 Acetic acid (2S,3R,5R,6R)-2,6-bis-benzyloxy-5-(tert-butyl-dimethyl-silanyloxy)-3-(4-methoxy-benzyloxy)-4,4-dimethyl-7-oxo-cyclooctyl ester