[A new isoflavone from Huoxue Yiqi Tang].

OBJECTIVE: To study the chemical constituents in the active parts of Huoxue Yiqi Tang. METHOD: The silica gel, Sephadex LH-20 were used to isolate the compounds, El, FAB-MS and 1D, 2D-NMR were used to identify the obtained compounds. RESULT: 14 compounds were obtained from the prescription. CONCLUSION: They were all first time obtained from the prescription. Among them, 7, 3'-dihydroxyl-5'-methoxyisoflavone is new.

[Isolation and identification of a new cucurbitacin from Picria fel-terrae].

AIM: To study compounds isolated from Picria fel-terrae. METHODS: The chemical constituents were separated and purified by column chromatography on silica gel and MCI. Their structures were identified on the basis of spectral data (IR, UV, MS, ID NMR and 2D NMR). RESULTS: A new cucurbitacin, along with a known one, were obtained from the 60% EtOH extract of the whole plant. CONCLUSION: The new compound was identified as 11, 24-dioxo-5, 21-diene-cucurbit-3alpha-O-beta-D-xylopyranosyl-16alpha-O-alpha-L-rhamnopyranoside (dehydrobryogenin glycoside). The known one, hexanorcucurbitacin F, was obtained for the first time from Picria fel-terrae.

[Study on the chemical constituents from Picria fel-tarrae].

OBJECTIVE: To isolate and identify compounds from Picria fel-tarrae in order to utilize it better. METHOD: Constituents from Picria fel-tarrae were isolated by several column chromatography and their structures were elucidated on the basis of chemical and spectral analysis. RESULT: Six compounds, N-benzoylphenylalanyl-L-phenylalaninol acetate (1), 1-hydroxy-7-hydroxymethyl-9,10-anthraquinone (2), 9, 16-dioxo-10,12,14-octadeca-trienoic acid (3), 5,7,4'-trihydroxy-flavone (4), beta-sitosterol (5), and daucosterol (6) were obtained from the fraction with relatively low polarity of EtOH extract of Picria fel-tarrae. CONCLUSION: Compounds 1-6 were isolated from picria fel-tarrae Lour for the first time, and the 13C-NMR data of compounds 1-3 are provided firstly in the literature.