Also available in 1 mg, 10 mg, 25 mg, 50 mg and bulk. Please contact Fisher for quotes. N-desmethyl Olanzapine is a metabolite of the atypical antipsychotic compound Olanzapinec, which is formed through the oxidative metabolism of olanzapine by the cytochrome 450 (CYP) isoenzyme CYP1A2. Purity 99.1%