Synonyms: Norquassin(6CI); Phenanthro[10,1-bc]pyran-1,5,11(4H)-trione, 3ab,6ab,7,7aa,8,11a,11ba,11c-octahydro-2-hydroxy-10-methoxy-3,8a,11ab,11cb-tetramethyl- (8CI); Phenanthro[10,1-bc]pyran,picrasa-2,12-diene-1,11,16-trione deriv.; 12-Norquassin; 12-Norquassine