[Studies on the chemical constituents of Chinese herb Melastoma dodecandrum].

To investigate the chemical constituents of Chinese herb Melastoma dodecandrum. The chemical constituents were isolated by solvent extraction and chromatography. Their structure were identified on the basis of physic-chemical constants and specral data. Five compounds were isolated and identified as hexacosanoic acid (I), quercetin(II), avicularin(III), gallic acid (IV), kaempferol(V). The above-mentioned compounds were separated from the plant for the first time.