Chemical Constituents of Euonymus glabra.

One new phenolic compound (1) and one new flavan (2), together with eight known compounds (3-10) were isolated from the stems and twigs of Euonymus glabra Roxb. Their structures were elucidated mainly on the basis of 1D and 2D spectroscopic methods and circular dichroism analysis. In addition, compounds 1-10 were tested for their inhibitory effects against LPS-induced NO production in RAW264.7 macrophages. Compounds 1-5 and 7 exhibited moderate inhibitory activities with IC50 values ranged from 5.1 to 11.9 μM.