1 9-diphenyl-1 3 6 8-nonatetraen-5-one July 8, 2019 16 32 64 128 1 9 diphenyl 1 3 6 8 nonatetraen 5 one 1 9-diphenyl-1 3 5 7-nonatetraene 1 5 dinitronaphthalene 9 10-diphenylanthracene 1 6-diphenyl-1 3 5-hexatriene