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Capsular Serotyping of Streptococcus pneumoniae by Latex Agglutination
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New ingol-type diterpenes from the latex of Euphorbia resinifera
Shu-Yun Wang1,2,3, Guo-Yu Li4, Ke Zhang4
1School of Pharmacy, Henan University , Kaifeng 475004 , China.
Abstract:
Two new ingol-type diterpenes, euphoresins A-B (1-2), have been isolated from the methanol extract of Euphorbium, the latex of Euphorbia resinifera Berg. Their structures were established on the basis of extensive analyses of their HR-ESI-MS, IR, UV, 1D, and 2D NMR spectra. The absolute configurations were confirmed by Mosher's method and circular dichroism (CD) analyses. The two compounds were tested for their cytotoxic activities against MCF-7, U937, and C6 cancer cell lines, but they both exhibited little cytotoxic effect.
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