PYRIDYLAZO-4-DIMETHYLANILINE;PYRIDINE-2-AZO-P-DIMETHYLANILINE;PYRIDINE-2-AZO-P-DIMETHYL-ANILINE TRANS ISOMER;PADA, TRANS ISOMER;PADA;TRANS-PYRIDINE-2-AZO-P-DIMETHYLANILINE;n,n-dimethyl-4-(2-pyridinylazo)-benzenamin;4-(2-PYRIDYLAZO)-N,N-DIMETHYLANILINE