2,6-Bis(chloromethyl)pyridine3099-28-330 % similar 4-Chloro-2,6-dimethylpyridine3512-75-230 % similar 2,6-Dichloro-4-methylpyridine39621-00-630 % similar 4-Bromo-2,6-dichloropyridine98027-80-630 % similar