Catalyzes the N-demethylation of aminopyrine and benzphetamine, but does not catalyze the hydroxylation of tolbutamide, testosterone, and progesterone. an organic molecule + O2 + reduced [NADPH--hemoprotein reductase] = an alcohol + H(+) + H2O + oxidized [NADPH--hemoprotein reductase] Liver. P450 can be induced to high levels in liver and other tissues by various foreign compounds, including drugs, pesticides, and carcinogens. Belongs to the cytochrome P450 family.