6',7' dihydroxybergamottin

6',7'-Dihydroxybergamottin(DHB), a well-known inhibitor of CYP3A4, the inhibition of CYP3A4 activity by DHB includes the inhibition of POR activity, DHB can inhibit nifedipine oxidation in a concentration-dependent manner.

6',7'-Dihydroxybergamottin is a potent inhibitor of CYP3A activity, and may be primarily responsible for the effects of grapefruit juice on cytochrome P450 activity in humans.