Diterpenoid alkaloids from <i>Delphinium naviculare</i> var. <i>lasiocarpum</i> with their antifeedant activity on <i>Spodoptera exigua</i>
Lianhai ShanSchool of Life Science and Engineering, Southwest Jiaotong University, Chengdu, P.R. ChinaLin ChenSchool of Chemistry and Chemical Engineering, China West Normal University, Nanchong, P.R. ChinaFeng GaoSchool of Life Science and Engineering, Southwest Jiaotong University, Chengdu, P.R. ChinaXian‐Li ZhouSchool of Life Science and Engineering, Southwest Jiaotong University, Chengdu, P.R. China
2018en
ABI
Abstract
A new lycoctonine diterpenoid alkaloid navicularine, along with eighteen known diterpenoid alkaloids, were isolated from the whole plant of Delphinium naviculare var. lasiocarpum. Their structures were elucidated on the base of extensive spectroscopic analysis (HR-ESI-MS and NMR) and comparison with data reported in the literature. Most of alkaloids were tested for their antifeedant activity against larvae of Spodoptera exigua (Hübner). The compound shawurensine showed considerably potent antifeedant activity (EC50 = 0.42 and 0.81 mg/cm2 in the choice test and no choice test, respectively).
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