(1E)-3-benzyl-2,2-dimethylpenta-3,4-dienal (2,4-dinitrophenyl)hydrazone InChI=1/C20H20N4O4/c1-4-16(12-15-8-6-5-7-9-15)20(2,3)14-21-22-18-11-10-17(23(25)26)13-19(18)24(27)28/h5-11,13-14,22H,1,12H2,2-3H3/b21-14 benzenebutanal, beta-ethenylidene-alpha,alpha-dimethyl-, (2,4-dinitrophenyl)hydrazone