Assertion: longleaf pine's needle | /r/MadeOf | isocupressic acid
Facets:
Source sentences:
text: The Agricultural Research Service of the U.S. Department of Agriculture says the needles of the ponderosa pine, Pinus ponderosa, contain isocupressic acid, which can induce abortions during the first trimester of pregnancy in cattle.
text: Both the dry and green needles contain isocupressic acid.