Assertion: codeine | /r/HasProperty | metabolized by o-demethylation
Facets:
value: to morphine
type: TRANSITIVE-OBJECT
Source sentences:
text: Codeine is metabolized by conjugation to codeine-6-glucuronide (70% to 80%), by O-demethylation to morphine (5% to 10%), and by N-demethylation to norcodeine (~10%).