acetic acid (3S,4S,5S,6S)-2,5-diacetoxy-6-acetoxymethyl-3-((2R,3S,4S,5R,6R)-3,5-diacetoxy-6-acetoxymethyl-4-carbamoyloxy-tetrahydropyran-2-yloxy)tetrahydropyran-4-yl ester                                                                                                                                                              在
                                                                                                                                                                                 
氢溴酸                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
二氯甲烷                                                                                  为溶剂,
                                                                                                                                                                                        生成                                                 
3,4,6-tri-O-acetyl-2-O-(2,4,6-tri-O-acetyl-3-O-carbamoyl-α-D-mannopyranosyl)-α-L-gulopyranosyl bromide