CAS Registry Number: 82571-53-7 CAS Name: (2E)-3-[4-(1H-Imidazol-1-ylmethyl)phenyl]-2-propenoic acid Additional Names: (E)-4-(imidazol-1-ylmethyl)cinnamic acid Molecular Formula: C13H12N2O2 Molecular Weight: 228.25. Melting point: mp 223-224°