4-imidazolone-5-propanoate => trans-urocanate + H2O
4-imidazolone-5-propanoate => trans-urocanate + h2o
4-imidazolone-5-propanoate => trans-urocanate + H2O
4-imidazolone-5-propanoate => trans-urocanate + h2o