Assertion: comfrey's root | /r/MadeOf | echimidine
Facets:
Source sentences:
text: The roots of Symphytum officinale contain pyrrolizidine alkaloids, including symlandine, symphytine, and echimidine.
text: : The roots of Symphytum officinale contain pyrrolizidine alkaloids, including symlandine, symphytine, and echimidine.