2-chloronicotinic acid 2942-59-8 3-PYRIDINECARBOXYLIC ACID,2-CHLORO 3-pyridinecarboxylic acid, 2-chloro- InChI=1/C6H4ClNO2/c7-5-4(6(9)10)2-1-3-8-5/h1-3H,(H,9,10