(1S,2S,4S,5'R,6R,7S,8R,9S,12S,13R,14R)-14-[(2R,3R,4S,5S,6R)-4,5-dimethoxy-6-methyl-3-[(3R,4S,5R,6R)-3,4,5-trimethoxy-6-(methoxymethyl)oxan-2-yl]oxyoxan-2-yl]oxy-17-methoxy-5',7,9,13-tetramethylspiro[5-oxapentacyclo[10.8.0.02,9.04,8.013,18]icos-18-ene-6,2'-oxane]                                                                                                                                                                                                                                                                                                          生成                                                 
Acetic acid (2R,3R,4S,5S,6R)-2,4,5-trimethoxy-6-methyl-tetrahydro-pyran-3-yl ester