Sometimes you just want to know which enzymes are likely to be involved in the metabolism of a molecule, CypReact DOI takes a structure (SMILES or sdf input) and predicts if the molecule will react with any one of the nine of the most important human cytochrome P450 (CYP450) enzymes [CYP1A2, CYP2A6, CYP2B6, CYP2C8, CYP2C9, CYP2C19, CYP2D6, CYP2E1, or CYP3A4]. Read more here..