1H-Indene-1,3(2H)-dione, 2-((4-(diethylamino)phenyl)methylene)- 2-((4-(Diethylamino)phenyl)methylene)-1H-indene-1,3(2H)-dione 2-(p-(Diethylamino)benzylidene)-1,3-indandione 34200-53-8 EINECS 251-874-7