Cannabinol (aka CBN) is a distinct cannabinoid found in hemp.
Dindings suggest CBN might exert a strong “entourage effect.” It might be the case that CBN enhances THC’s sedating qualities. CBN might also strengthen the sleep-inducing effects of certain terpenes.
Bottom line: CBN on its own might not have a strong sedating effect. But, when it’s combined with other compounds, it might strengthen sedation.