Biotransformation Seven major metabolites were identified and the metabolic pathways were identified as glucuronidation at the pyridine nitrogen, pyridine– N– oxidation with and without 3’– hydroxylation on the indane ring, 3’– hydroxylation of indane, p– hydroxylation of phenylmethyl moiety, and N– depyridomethylation with and without the 3’– hydroxylation.