N-(2,3,4,6-tetra-O-benzyl-α-D-glucopyranosyl)-N'-<(1S)-2,3,4,5-tetrahydroxy-5-(hydroxymethyl)cyclopentyl>thiourea                                                                                                                                                              在
                                                                                                                                                                                 
mercury(II) oxide                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
乙醚   、                                                                                         
丙酮                                                                                  为溶剂,
                                                                                                                                                    反应 23.0h,
                                                                                                                以100%的产率得到(3aS,4S,5S,6R,6aR)-4-Hydroxymethyl-2-[(Z)-(2S,3R,4S,5R,6R)-3,4,5-tris-benzyloxy-6-benzyloxymethyl-tetrahydro-pyran-2-ylimino]-hexahydro-cyclopentaoxazole-4,5,6-triol