Assertion: periwinkle | /r/MadeOf | alkaloid
Facets:
Source sentences:
text: Since this periwinkle contains these alkaloids, if ingested by dogs, they can be poisonous and cause a variety of side effects.
text: Catharanthus roseus contains two classes of active compounds, the alkaloids and the tannins.
text: Madagascar periwinkle contains an alkaloid, reserpine, which is well known for its ability to lower the levels of blood pressure.