Two new monosaccharide steroidal saponins,named ypsilandroside S(1)and ypsilandroside T(2),have been isolated from the whole plants of Ypsilandra thibetica.Their structures were elucidated as heloniogenin 3-O-b-D-apio...Two new monosaccharide steroidal saponins,named ypsilandroside S(1)and ypsilandroside T(2),have been isolated from the whole plants of Ypsilandra thibetica.Their structures were elucidated as heloniogenin 3-O-b-D-apiofuranoside(1)and pregna 5,16-dien-3b,12a-diol-20-one-3-O-b-D-apiofuranoside(2)by spectroscopic techniques(1D and 2D NMR,MS).Compounds 1 and 2 were tested for their inhibitory effects on lipopolysaccharide-induced nitric oxide production in RAW 264.7 cells.展开更多
基金the National Natural Science Funding of China(No.31170333)the Natural Science Foundation of Yunnan Province(No.2009CC019).
文摘Two new monosaccharide steroidal saponins,named ypsilandroside S(1)and ypsilandroside T(2),have been isolated from the whole plants of Ypsilandra thibetica.Their structures were elucidated as heloniogenin 3-O-b-D-apiofuranoside(1)and pregna 5,16-dien-3b,12a-diol-20-one-3-O-b-D-apiofuranoside(2)by spectroscopic techniques(1D and 2D NMR,MS).Compounds 1 and 2 were tested for their inhibitory effects on lipopolysaccharide-induced nitric oxide production in RAW 264.7 cells.
