Assertion: quinine | /r/HasProperty | synthesized in laboratory
Facets:
value: since 1944
type: TEMPORAL
Source sentences:
text: Quinine was first synthesized in a laboratory in 1944; however, synthesis of the drug on a commercial scale is not economically feasible.
text: Quinine has been synthesized in the laboratory since 1944; however, it is still often sourced from the cinchona trees.