propyl {6-O-[(2-{[N-(fluoren-9-ylmethoxycarbonyl)-S-(tert-butylsulfanyl)-L-cysteinyl]amino}ethyl)phosphonato]-α-D-mannopyranosyl}-(1->2)-α-D-mannopyranoside                                                                                                                                                              在
                                                                                                                                                                                 
sodium methylate                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
甲醇                                                                                  为溶剂,
                                                                                                                                                    反应 2.0h,
                                                                                                                以74%的产率得到propyl {6-O-[(2-{[S-(tert-butylsulfanyl)-L-cysteinyl]amino}ethyl)phosphonato]-α-D-mannopyranosyl}-(1->2)-α-D-mannopyranoside