Assertion: periwinkle's leaf | /r/MadeOf | tetrhydrolastonine
Facets:
Source sentences:
text: The leaves contain cartharanthine, leurosin, 21-oxo-leurosine, catharanthamine, coronaridine, vindoline, vimblastine, leurosidine, vincristine, tetrhydrolastonine, lochnerine, vincarodine, - Nboxide and pericylivine as reported by Cordell (2001).