Coelenterazine i is a synthetic derivative of coelenterazine. The luminescence intensity of its aequorin complex is about 3% that of the aequorin formed from native coelenterazine and the response time to calcium is the slowest of all coelenterazine analogs. Yellow solid soluble in MeOH or EtOHStore at -20°C and protect from lightC26H20IN3O2MW: 533.3