1,3-Indandione, 2-(2-pyridyl)- 1H-Indene-1,3(2H)-dione, 2-(2-pyridinyl)- 2-(1,3-Dioxohydrindenyl-(2))pyridine 2-(2'-Pyridyl)-indan-1,3-dione 2-(2-Pyridyl)-1,3-indandione 641-63-4 NSC42212 Pyrophthalone