Chrysene is a high molecular weight (HMW), polycyclic aromatic hydrocarbon (PAH).

Wulignan A1 exhibits activity against leukemia P-388 in vitro; it also may have anti-influenza virus H1N1 and H1N1-TR (a Tamiflu drug resistant virus strain) activities.

Thalicminine is an alkaloid, which is found in Thalictrum species. Thalicminine can cause respiratory stimulation and a brief hypotensive effect on dogs. Thalicminine also prolongs the hypnotic effect of Chloral hydrate in mice.