1,3-Benzenedicarbonitrile, 4-hydroxy-2,5,6-trichloro-, 4-methylcarbamate 4-Hydroxy-2,5,6-trichloro-1,3-benzenedicarbonitrile, 4-methylcarbamate 4-Hydroxy-2,5,6-trichloroisophthalonitrile, 4-methylcarbamate 67205-72-5