5-chloro-3-methylbenzo b thiophene-2-carboxylic acid,5-chloro-3-methyl-1-benzothiophene-2-carboxylic ac,5-chloro-3-methyl-benzo b thiophene-2-carboxylic acid,5-chloro3-methyl-benzo b thiophene-2-carboxylic acid,5-chloro-3-methyl-1-benzo b thiophene-2-carboxylic acid