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Occurrence of the insecticidal 16,17-didehydro-16(E)-stemofoline in Stemona collinsae
S Jiwajinda1, N Hirai, K Watanabe
1Central Laboratory and Greenhouse Complex, Kasetsart University, Nakhon-Pathom, Thailand. rdiswj@nontri.ku.ac.th
Phytochemistry
|April 21, 2001
Abstract:
The occurrence of two alkaloids, 16,17-didehydro-16(E)-stemofoline and its isomer at C-4, 16,17-didehydro-4(E)-16(E)-stemofoline, were found together with a known insecticidal compound, stemofoline, in Stemona collinsae. The 16,17-didehydro-16(E)-stemofoline displayed higher insecticidal and antifeedant activities against the diamondback moth larvae than stemofoline.