pent-4-enyl 4,6-dideoxy-4-((S)-3-hydroxylbutanamido)-2-O-methyl-β-D-glucopyranosyl-(1->3)-α-L-rhamnopyranosyl-(1->3)-α-L-rhamnopyranosyl-(1->2)-α-L-rhamnopyranoside   、                                                                                      
硫代乙酸                                                                                                                                                              在
                                                                                                                                                                                 
偶氮二异丁腈                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
1,4-二氧六环                                                                                  为溶剂,
                                                                                                                                                                                        以89%的产率得到5-thioacetylpentyl 4,6-dideoxy-4-((S)-3-hydroxylbutanamido)-2-O-methyl-β-D-glucopyranosyl-(1->3)-α-L-rhamnopyranosyl-(1->3)-α-L-rhamnopyranosyl-(1->2)-α-L-rhamnopyranoside