110576-16-4 9-((3,4-Dimethoxyphenyl)methylene)-9H-indeno(2,1-b)pyridine 9-(3,4-Dimethoxybenzylidene)-1-azafluorene 9H-Indeno(2,1-b)pyridine, 9-((3,4-dimethoxyphenyl)methylene)-