The molecule is a member of the class of phenanthridines that is phenanthridine with an oxo substituent at position 6. A poly(ADP-ribose) polymerase (PARP) inhibitor, it has been shown to exhibit immunosuppressive activity. It has a role as a mutagen, an immunosuppressive agent and an EC 2.4.2.30 (NAD(+) ADP-ribosyltransferase) inhibitor. It is a lactam and a member of phenanthridines.
5H-phenanthridin-6-one