Assertion: vitamin e's form | /r/HasProperty | labeled dl
Facets:
value: usually
type: TEMPORAL
Source sentences:
text: “d” vitamin E, while synthetic vitamin E is a mixture of eight isomeric forms, usually labeled “all-rac” or “dl.
text: The synthetic form is labelled " dl " or "all rac," while the natural form is labelled " d " or " RRR .