2-对甲苯噻唑-4-羧酸乙酯

2-(4-氯苯基)-噻唑-4-羧酸乙酯

2-(2-甲氧基苯基)-噻唑-4-羧酸乙酯

2-(吡啶-2-基)噻唑-4-羧酸乙酯

Ethyl 2,3-bis(phenylhydrazono)propionate