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[Studies on triterpenoids of Populus yunnanensis Dode].

Zhaojing Chen, Ping Xu

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Abstract

Three triterpenoids (I, II and III) were isolated from the roots of Populus yunnanensis Dode, which has been used as a folk remedy for the treatment of urinary tract infection and calculus in Yunnan Province. Compound I and III were identified as friedelin and 21 alpha-hydroxyfriedelan-3-one and compound II as 21 alpha-acetoxyfriedelan-3-one which is a new triterpenoid. 13C NMR data of II showed that the presence of an alpha-acetoxy group at C-21 does not affect the boat conformation of ring E similar to the results in the study of some other D:A-friedo-oleananes.

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What this paper is about

Three triterpenoids (I, II and III) were isolated from the roots of Populus yunnanensis Dode, which has been used as a folk remedy for the treatment of urinary tract infection and calculus in Yunnan Province. Compound I and III were identified as friedelin and 21 alpha-hydroxyfriedelan-3-one and compound II as 21 alpha-acetoxyfriedelan-3-one which is a new triterpenoid. 13C NMR data of II showed that the presence of an alpha-acetoxy group at C-21 does not affect the boat conformation of ring E similar to the results in the study of some other D:A-friedo-oleananes.

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Available abstract

Three triterpenoids (I, II and III) were isolated from the roots of Populus yunnanensis Dode, which has been used as a folk remedy for the treatment of urinary tract infection and calculus in Yunnan Province. Compound I and III were identified as friedelin and 21 alpha-hydroxyfriedelan-3-one and compound II as 21 alpha-acetoxyfriedelan-3-one which is a new triterpenoid. 13C NMR data of II showed that the presence of an alpha-acetoxy group at C-21 does not affect the boat conformation of ring E similar to the results in the study of some other D:A-friedo-oleananes.

Key concepts: Friedelin, Triterpenoid, Folk medicine, Traditional medicine, Stereochemistry, Chemistry, Botany, Biology

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