乙酸酐   、                                                                                      
trevoagenin A                                                                                                                                                              在
                                                                                                                                                                                 
sodium acetate                                                                                                                                  作用下,
                                                                                                                                                                                        反应 5.0h,
                                                                                                                以0.06 g的产率得到Acetic acid (3S,5R,8R,9R,10R,13R,14S,17S)-3-acetoxy-17-[(2R,5R)-5-(1-acetoxy-1-methyl-ethyl)-2-methyl-tetrahydro-furan-2-yl]-4,4,8,10-tetramethyl-16-oxo-hexadecahydro-cyclopenta[a]phenanthren-14-ylmethyl ester