(5
R)-8
t-benzyloxy-2,2,6
c-trimethyl-(5
rO)-1,3,7-trioxa-spiro[4.4]non-9
c-yl 
O4,
O6-isopropylidene-2-methylamino-α-
L-2-deoxy-glucopyranoside                                                                                                                                                              在
                                                                                                                                                                                 
sodium hydroxide   、                                                                                                  
溶剂黄146                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
丙酮                                                                                  为溶剂,
                                                                                                                                                                                        生成                                                 
benzyl O2-(N,O3-carbonyl-2-methylamino-α-L-2-deoxy-glucopyranosyl)-3-hydroxymethyl-α-L-5-deoxy-lyxofuranoside