| Literature DB >> 11190402 |
V L Marques1, F M De Oliveira, L M Conserva, R G Brito, G M Guilhon.
Abstract
Two dichromenoxanthones [1,6-dihydroxy-6',6'-dimethylpyrano(2',3':3,4)-6'',6''-dimethylpyrano(2'',3'':7,8)xanthone (brasilixanthone A) and 1,6-dihydroxy-6',6'-dimethylpyrano(2',3':2,3)-6'',6''-dimethylpyrano(2'',3'':7,8)xanthone (brasilixanthone B)], along with betulinic acid, friedelin, sitosterol and stigmasterol were isolated from the roots and stems of Tovomita brasiliensis. Their structures were characterized on the basis of 1H and 13C NMR spectral data, including 2D NMR experiments.Entities:
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Year: 2000 PMID： 11190402 DOI： 10.1016/s0031-9422(00)00296-x
Source DB: PubMed Journal: Phytochemistry ISSN： 0031-9422 Impact factor: 4.072