1-O-fluoren-9-ylmethoxycarbonyl-3,4,6-tri-O-acetyl-α-D-mannopyranoside   、                                                                                      
2,3,4,6-四-O-乙酰基-α-D-吡喃甘露糖 三氯乙酰亚胺酯                                                                                                                                                              在
                                                                                                                                                                                 
三氟甲磺酸三甲基硅酯                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
二氯甲烷                                                                                  为溶剂,
                                                                                                                                                                                        生成                                                 1-O-fluoren-9-ylmethoxycarbonyl-(2,3,4,6-tetra-O-acetyl-α-D-mannopyranosyl)-(1->2)-3,4,6-tri-O-acetyl-β-D-mannopyranoside   、                                                                                             
1-O-fluoren-9-ylmethoxycarbonyl-(2,3,4,6-tetra-O-acetyl-α-D-mannopyranosyl)-(1->2)-3,4,6-tri-O-acetyl-α-D-mannopyranoside