6-氯-3-羟基吡嗪-4-羧酸

3-羟基-5-甲基哒嗪

3,6-二氯哒嗪-4-羧酸

6-chloro-7-methyltetrazolo[1,5-b]pyridazine

6-chloro-8-methyltetrazolo[1,5-b]pyridazine