Assertion: stemona alkaloid | /r/HasProperty | isolated in recent investigation
Facets:
value: from the roots of s. parviflora
type: LOCATION
Source sentences:
text: In a more recent investigation twenty-five Stemona alkaloids were isolated from the roots of S. parviflora, collected in Hainan island in China, and tested for their activity against the nematode Panagrellus redivivus.