Isolation of Triterpenoids from Catunaregam spinosa

Ke Di Yang; Yue Juan Li; Li Ge; Zu Zeng Qin

doi:10.4028/www.scientific.net/AMR.236-238.1731

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Electrical and Mechanical Properties of Carbon Aerogels / Phenolic Resin for Nanocomposites
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Isolation of Triterpenoids from Catunaregam spinosa
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Isolation of Triterpenoids from Catunaregam spinosa

Abstract:

Investigation on the antifeedant activity and toxicity of Catunaregam Spinosa (Rubiaceae) fruits revealed that the n-butanol fraction from methanolic extract of Catunaregam Spinosa fruits showed effective antifeedant activity and toxicity against the larvae of Pieris rapae and Plutella xylostella. Continued chemical investigation on the n-butanol fraction yielded five triterpenoids. Use of NMR, MS and sugar analysis gave structures of three triterpenoid saponins with branched monosaccharide chain as 3-O-[β-D-glucopyranosyl-(1→3)-β-D-6-O-methyl-glucuronopyranosyl oxy]-2β-hydroxy-olean-12-en-28-oic acid (1), 3-O-[β-D-glucopyranosyl-(1→2)-β-D-glucopyran -osyl]-olean-12-en-28-oic acid (2), 3-O-[β-L-rhamnopyranosyl-(1→3)-β-D-glucuronopyranosyl- (1→2)-β-D-glucopyranosyl-(1→2)-β-D-glucopyranosyl]-12-en-28-oic acid (3), and along with triterpenoids as Oleanolic acid (4), 3β,23-dihydroxy-olean-12-ene-28-oic acid (5), respectively.