[pip-uh-reen, -er-in] /ˈpɪp əˌrin, -ər ɪn/

noun, Chemistry.
a white, crystalline alkaloid, C 1 7 H 1 9 NO 3 , obtained from pepper and other piperaceous plants and also prepared synthetically: used as an insecticide.
/ˈpɪpəˌraɪn; -rɪn/
a crystalline insoluble alkaloid that is the active ingredient of pepper, used as a flavouring and as an insecticide. Formula: C17H19NO3

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