乙酸酐   、                                                                                      
melilotoside C                                                                                                                                                              在
                                                                                                                                                                                 
吡啶                                                                                                                                  作用下,
                                                                                                                                                                                        反应 48.0h,
                                                                                                                以1.9 g的产率得到[(2R,3S,4S,5R,6S)-6-[(2S,3R,4S,5S)-2-[[(3S,4S,4aR,6aR,6bS,8aR,9R,12aS,14aR,14bR)-9-acetyloxy-4-(acetyloxymethyl)-4,6a,6b,8a,11,11,14b-heptamethyl-1,2,3,4a,5,6,7,8,9,10,12,12a,14,14a-tetradecahydropicen-3-yl]oxy]-4,5-diacetyloxyoxan-3-yl]oxy-3,4-diacetyloxy-5-[(2S,3R,4R,5S,6S)-3,4,5-triacetyloxy-6-methyloxan-2-yl]oxyoxan-2-yl]methyl acetate