1H-phenalen-1-one, 2-hydroxy-9-phenyl- 2-Hydroxy-9-phenyl-phenalen-1-one 2-hydroxy-9-phenyl-1H-phenalen-1-one Anigorufone InChI=1/C19H12O2/c20-16-11-14-8-4-7-13-9-10-15(12-5-2-1-3-6-12)18(17(13)14)19(16)21/h1-11,20