1,3-Indandione, 2-(1-ethyl-4(1H)-pyridinylidene)- 2-(1-Ethyl-4(1H)-pyridinylidene)-1,3-indandione 2-(1-Ethyl-4(1H)-pyridinylidene)-1H-indene-1,3(2H)-dione 49803-30-7 5-21-11-00390 (Beilstein Handbook Reference) BRN 1534418