A phytochemical investigation on the stems and rhizomes of Sinomenium acutum led to the isolation of 19 compounds, including three phenanthrenes, six anthraquinones, and ten phenolic derivatives. The structures of the isolated compounds were elucidated by analysis of the MS and NMR spectroscopic data and comparison with the literature. Compounds 1 and 2 are two new natural products, and their 1H and 13C NMR spectral data were fully assigned for the first time, with the help of2D NMR. All of the isolates were obtained from genus Sinomenium for the first time and the phenanthrene and anthraquinone are the structure type first reported from this genus plants.
Murraya exotica L. is one of the two official source species of traditional Chinese medicine Murrayae Folium et Cacumen. At present, a rapid HPLC analysis method to simultaneously determine two major coumarins, hainanmurpanin （1） and meranzin （2）, and one main flavonoid, 3,5,6,7,3＇,4＇,5＇-heptamethoxyflavone （3）, from the leaves and twigs of M. exotica was established. The analysis was performed on a DIKMA Spursil C18 column （4.6 minx250 mm, 5 ~m） at a flow rate of 1 mL/min, using acetonitrile-H20 （5：5, v/v） as mobile phase. The column temperature was 25 ^（2, and the detected wavelength was at 320 nm. The three analytes （1-3） were separated well with good linearity, precision, stability and repeatability. The average recoveries were in the range of 100.52%-101.97%, with RSD less than 1.73%. Twenty batches of M. exotica from different habitats were detected, and the sum of the contents of 1-3 was in the range of 1.55-7.45 mg/g, respectively. Besides, the contents of these three analytes were also determined for the samples from different medicinal parts （stems, lateral branches, mixture of twigs and leaves） and different harvest times. The results showed that the contents of these three analytes in leaves and twigs are much higher than those in the stems or lateral branches; the plants harvested from June or October contain more active compounds than those from the other months. The above results proved that this high performance and simple HPLC assay can be readily utilized as a practical method for the quality control of M. exotica.
