2,3,5,6-Tetrachloro-4-pyridinethiol10351-06-1100 % similar Pentachloropyridine2176-62-758 % similar 2,4,5,6-Tetrachloropyrimidine1780-40-145 % similar Davicil13108-52-638 % similar 2,3,4,5-Tetrachloro-6-(trichloromethyl)pyridine1134-04-936 % similar 2,3,4,6-Tetrachloropyridine14121-36-936 % similar 4,5,6-Trichloropyrimidine1780-27-433 % similar 2,3,5,6-Tetrachloropyridine2402-79-133 % similar Tetrachloropicolinic acid10469-09-731 % similar