effects. For these purposes, a series of 1,8-naphthalimide derivatives were designed and synthesized, and their structure-activityrelationships (SAR) as hCYP1B1 inhibitors were analyzed. Following three rounds SAR studies, several potent hCYP1B1 inhibitors were discovered, among which compound was selected for further investigations owing to its extremely potent anti-hCYP1B1 activity (IC = 0.040 nM)