Triterpenoids and steroids from Excoecaria agallocha / 中国中药杂志

<p><b>OBJECTIVE</b>To study the chemical constituents of Excoecaria agallocha L.</p><p><b>METHOD</b>The constituents were isolated and purified by repeated column chromatography and their structures were elucidated by spectroscopic analysis.</p><p><b>RESULT</b>Six triterpenoids including taraxerone (1), beta-amyrin acetate (2), 3beta-[(2E,4E)-6-oxo-decadienoyloxy]-olean-12-ene (3), taraxerol (4), acetylaleuritolic acid (5), and cycloart-22-ene-3beta, 25-diol (6), and three steroids including beta-sitostenone (7), (24R)-24-ethylcholesta-4,22-dien-3-one (8), and beta-sitosterol (9) were isolated and identified from the stems and twigs of the mangrove plant E. agallocha.</p><p><b>CONCLUSION</b>Compounds 5-8 were isolated from E. agallocha for the first time.</p>

Chemical constituents from herb of Gueldenstaedtia stenophylla / 中国中药杂志

<p><b>OBJECTIVE</b>To study the chemical constituents of Gueldenstaedtia stenophylla.</p><p><b>METHOD</b>Various chromatographic techniques were used to separate and purify the constituents and structure determination was mainly based on the analysis of the spectroscopic data.</p><p><b>RESULT</b>Seven compounds, including 2', 4, 7-trihydroxy-4'-methoxyisoflavans (1), genkwanin (2), quercetin (3), rutin(4), 12-oleanen-3beta, 22beta, 24-triol (5), betulinic acid (6), and 3, 4-dihydroxybenzoic acid (7) were isolated and identified.</p><p><b>CONCLUSION</b>All these compounds were isolated from the genus Gueldenstaedtia for the first time.</p>