naphthalene dicarboxylic acidunsaturated dicarboxylic acidcyclohexane dicarboxylic acidaromatic dicarboxylic acidaliphatic dicarboxylic acidacetylene dicarboxylic acidbipyridine dicarboxylic acid2 6 pyridine dicarboxylic acidbiphenyl dicarboxylic acidacetone dicarboxylic acidferrocene dicarboxylic acidbenzene 1 4 dicarboxylic acid