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Triterpenoid saponins with antifeedant activities from stem bark of Catunaregam spinosa (Rubiaceae) against Plutella xylostella (Plutellidae)
Authors:Gao Guangchun  Lu Zhongxian  Tao Shuhong  Zhang Si  Wang Fazuo
Affiliation:aGuangdong Key Laboratory of Marine Material Medica, South China Sea Institute of Oceanology, Chinese Academy of Sciences, 164 West Xingang Road, Guangzhou 510301, PR China;bInstitute of Plant Protection and Microbiology, Zhejiang Academy of Agriculture Science, Hangzhou 310021, PR China;cGuangdong Pharmaceutical University, University City, Guangzhou 510006, PR China
Abstract:Seven triterpenoid saponins, including four new compounds, catunarosides A–D (14), and three known compounds, swartziatrioside (5), aralia-saponin V (6), araliasaponin IV (7) were isolated from the stem bark of Catunaregam spinosa, a Chinese mangrove associate. Their structures were elucidated on the basis of their spectral data and hydrolysis experiments. The antifeedant activities of compounds 17 against Plutella xylostella were also evaluated.
Keywords:Triterpenoid saponins   Catunaregam spinosa   Catunarosides A&ndash  D   Plutella xylostella   Antifeedant activity
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