(1S,2S,5R,6R,7R,10S,12S,13R)-6,13-bis(hydroxymethyl)-2,6-dimethyltetracyclo[10.3.1.01,10.02,7]hexadecane-5,13-diol 生成 [(1S,2S,5R,6R,7R,10S,12S,13R)-5-acetyloxy-13-(acetyloxymethyl)-13-hydroxy-2,6-dimethyl-6-tetracyclo[10.3.1.01,10.02,7]hexadecanyl]methyl acetate