Assertion: cyclopropane | /r/ObjectUse | used as general anesthetic
Facets:
value: since 1930
type: TEMPORAL
value: in the clinic
type: LOCATION
Source sentences:
text: Although cyclopropane itself has been used as a general anesthetic in the clinic since 1930, more than 30 years passed before the first cyclopropane derivative, trans-2-phenylcyclopropylamine, became available in medicine.