Abstract
Some α-methylene-β-butyrolactones and congeners were synthesized and their growth inhibitory activities were assayed on rice seedlings and Avena coleoptile sections. In the latter bioassay, the inhibitory activities of the synthetic α-methylene-γ-lactones were comparable to those of heliangine and pyrethrosin, the natural inhibitors possessing α-methylene-γ-lactone moiety.
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