Hyvroxilated quint-ethyl metacetamine was a component in an anesthetic.
In 2370, Quark tried to give hyvroxilated quint-ethyl metacetamine to Doctor Bashir in an attempt to "fix'" a racquetball match between Bashir and Chief Miles O'Brien, after everyone had bet against the Chief. The Doctor caught him and Quark was severely reprimanded. (DS9: "Rivals")