7-Ethoxyresorufin (CAS 5725-91-7)

7-Ethoxyresorufin is a fluorimetric substrate and suicide inhibitor of CYP (cytochrome P450). Also shown to inhibit several reductase enzymes, specifically CYPOR (NADPH-P450 reductase). The binding to CYP (cytochrome P450) is thought to inhibit the vasorelaxant response to acetylcholine. 7-Ethoxyresorufin has also demonstrated inhibition of NO synthesis by uncoupling neuronal NOS1 (nitric oxide synthase); it is a noncompetitive inhibitor of neuronal NOS1 with respect to L-arginine with a Ki value of 0.76 +/- 0.06 μM. 7-Ethoxyresorufin is a substate of CYP1A1.