benzyl 3,4,6-tri-O-benzyl-2-O-<2,4,6-tri-O-acetyl-3-O-(acetylcarbamoyl)-α-D-mannopyranosyl>-β-L-gulopyranoside                                                                                                                                                              在
                                                                                                                                         palladium on activated charcoal                                                                                                                                                                                                                               
氢气                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
乙醇                                                                                  为溶剂,
                                                                                                                                                    反应 14.0h,
                                                                                                                以62%的产率得到2-O-<2,4,6-tri-O-Acetyl-3-O-(N-acetylcarbamoyl)-α-D-mannopyranosyl>-L-gulopyranose