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Puberosides C-E, triterpenoid saponins from Glochidion puberum
Zhen Zhang1, Xin Fang, Yue-Hu Wang
1State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Science, Kunming 650204, China.
Abstract:
Three new triterpenoid glycosides, named puberosides C-E (1-3), were isolated from the water-soluble fraction of Glochidion puberum (Linn.) Hutch. Their structures were determined as 3α-[(O-β-d-glucopyranosyl-(1 → 3)-O-α-l-arabinopyranosyl)oxy]-22α-trans-cinnamoyl-olean-12-ene-16α,28-diol, 3α-[(O-β-d-glucopyranosyl-(1 → 3)-O-α-l-arabinopyranosyl)oxy]-22α-cis-cinnamoyl-olean-12-ene-16α,28-diol, and 3α-[(O-β-d-glucopyranosyl-(1 → 3)-O-β-d-glucopyranosyl)oxy]-22α-benzoyloxy-olean-12-ene-16α,28-diol by the combination of 1D, 2D NMR, and MS spectral analyses.
