Ten compounds were isolated from the fruit of Rosa davurica Pall.. They were elucidated by spectroscopic and chemical methods as casuarictin, 1,2,3, 6-tetra-O-galloyl-?-D-glucose,1,2,3,4,6-Penta-O-galloyl -?-D-glucse, agrimoniin, laevigatins D, laevigatins F, davuriciin M1, davuriciin D1, davuriciinD2 and davuriciin T1.

Objective To study tannins of Corylus heterophylla from Heilongjiang Province. Methods The constituents were separated and purified repeatedly by macroporons resin chromatography methods and their structures were identified by 1H-NMR, 13C-NMR, FAB-MS, and 1H-1HCOSY spectra, and chemical methods as well. Results Three tannins were obtained from C. heterophylla. They were heterophylliin D (Ⅰ), roxbin A ( Ⅱ ), and rugosin F ( Ⅲ ). Conclusion Heterophylliin D ( Ⅰ ) is isolated from the extract of C. heterophylla leaves as a new dimmer tannin firstly.

Pharmacognostic studies on the sollrce, shape, morphology, microscopic structrue and physico-chemical properties of the genitalia of mink were carried out in comparison with those of deer,donkey and dog with similar pharmacologic actions. Results showed that the genitalia of mink has its specific features in shape,mi croscopic structure and physico-chemical properties which can be used as the main characteristics to distin guish it from those of other animals. Chemical analysis showed that the genitalia of mink was rich in aminoacids and its zinc,manganese and calcium contents exceeded those present in the genitalia of other ani mals

Object To study tannin components in the leaves of Corylus heterophylla Fisch. Methods They were identified by (()~1H-NMR), (()~(13)C-NMR), FAB-MS, CD, 2-dimensional (()~1H-()~1HCOSY) spectra, and chemical methods. Results Four compounds were obtained from the plant. They are a new one, heterophylliin B (Ⅰ) and three known tannins, tellimagrandin Ⅱ (Ⅱ), casuarictin (Ⅲ), and casuarinin (Ⅳ).Conclusion Heterophylliin B is an ellagitannin dimer.