Assertion: comfrey's compound | /r/Synonym | pyrrolizidine alkaloids
Facets:
Source sentences:
text: It also contains poisonous compounds called pyrrolizidine alkaloids.
text: The toxic compounds found are pyrrolizidine alkaloids (eight have been identified), which include lasiocarpine and symphtine.
text: One of the news items reads: ‘Dr. Culvenor’s research group at Parkville has been studying the compounds called pyrrolizidine alkaloids, which occur in such pasture weeds as Ragwort, Paterson’s Curse and Heliotrope, the last two weeds being from the same family as comfrey.
text: Even though comfrey is a useful herb, it contains poisonous compounds called pyrrolizidine alkaloids that can harm the liver if ingested or even absorbed through the skin in unsafe quantities.