Synthesis and immunosuppressive activity of l-rhamnopyranosyl flavonoids
作者:Xiaoliang Yang、Yang Sun、Qiang Xu、Zijian Guo
DOI:10.1039/b604521a
日期:——
play essential roles in determining the biologicalactivity of the flavonoids: the position at which the sugar is linked to the flavone, the presence of carbonyl on C-4 and phenol hydroxyl group in A or B ring. However, the presence of a B ring is unfavorable for the biologicalactivity and the double bond at C2-C3 in C-ring shows little effect on the activity.