1,4-bis(3-pyridyl)-2,3-diaza-1,3-dutadiene, nicotinaldehyde (3-pyridylmethylene)hydrazone, 1,4-bis(3-pyridyl)-2,3-diazabuta-1,3-diene, Azinobis[3-pyridinylmethane], 1,2-Bis(3-pyridylmethylene)hydrazine, 1,4-bis(3-pyridyl)-2,3-diazo-1,3-butadiene, Azinobis[(3-pyridyl)methane], N,N'-bis-pyridin-3-ylmethylene-hydrazine, 1,4-di-3-pyridyl-2,3-diaza-1,3-butadiene, 1,4-bis(3-pyridyl)-2,3-diaza-1,3-butadiene, 3-Pyridinecarbaldehyde (3-pyridinylmethylene)hydrazone