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[Ontogenetic chemical changes of the active constituents in mudan (Paeonia suffruticosa) and shaoyao (P. lactiflora].

JS Yu, Xiao Pg

Abstract

By means of a quantitative HPTLC scanning method, changes in 7 active constituents of the toot of Mudan (Paeonia suffruticosa) and Shaoyao (P. lactiflora) were determined. The specimens were collected in different ontogenetic stages. The 7 constituents were paeoniflorin (Ⅰ), benzoylpaeoniflorin (Ⅱ), oxypaeoniflorin (Ⅲ), paeonol (Ⅳ), paeonoside (Ⅴ), apiopaeonoside (Ⅵ) and paeonolide (Ⅶ).The results showed that all these constituents were higher from May to June and September to October, and lower in April and from July to August respectively. The best collecting time should be in early and late spring or in autumn.

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Key concepts: Paeoniflorin, Paeonia lactiflora, Paeonia suffruticosa, Paeonol, Traditional medicine, Chemical constituents, Chemistry, Botany