Synonyms: Pyridine, 4,4'-[[2,2-bis[(4-pyridinyloxy)methyl]-1,3-propanediyl]bis(oxy)]bis-, 4,4'-[[2,2-Bis[(4-pyridinyloxy)methyl]-1,3-propanediyl]bis(oxy)]bis[pyridine]; Tetrakis(4-pyridyloxymethane); Tetrakis(4-pyridyloxymethyl)methane; Tetrakis(4-pyridyloxymethylene)methane