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ENGLISH ABSTRACT
JOURNAL ARTICLE
[Anti-complement alkaloids from whole plants of Viola yedoensis].
Zhongguo Zhong Yao za Zhi = Zhongguo Zhongyao Zazhi = China Journal of Chinese Materia Medica 2017 December
Fifteen alkaloids were isolated from the 95% ethanol extract of the whole plants of Viola yedoensis by various column chromatographic techniques such as silica gel and Sephadex LH-20. Their structures were identified as neoechinulin A(1),N-benzoyl-L-p-hydroxy-phenylalaninol(2),aurantiamide acetate(3),aurantiamide(4),anabellamide(5),trichosanatine(6),indole-3-carboxylic acid methyl ester(7),3-carboxyindole(8),N-trans-feruloyl-tyramine(9),paprazine(10),7'-(3', 4'-dihydroxyphenyl)-N-[(4-methoxyphenyl)ethyl]propenamide(11),cannabisin F(12),N-(4-hydroxyphenethyl)octacosanamide(13),N-(4-hydroxyphenethyl)hexacosanamide(14)and N-benzoyl-L-phenylalaninol(15). All the compounds except 3 and 4 were isolated from this plant for the first time. These alkaloids exhibited anti-complement activity against the classical pathway(CP)and the alternative pathway(AP)with the CH50 and AP50 values ranging from 0.12 to 0.33 g•L⁻¹ and 0.22 to 0.50 g•L⁻¹, respectively. Preliminary mechanism study using complement-depleted sera showed that these alkaloids acted on different complement components in the complement activation cascade.
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