5,6-dimethyl-2-methylsulfanyl-3H-thieno[2,3-d]pyrimidin-4-one

(4-羟基-5,6-二甲基噻吩并[2,3-d]嘧啶-2-基磺酰基)-乙酸

4,5-dimethyl-2-(3-methyl-thioureido)-thiophene-3-carboxylic acid ethyl ester

ethyl 2-(butylcarbamothioylamino)-4,5-dimethylthiophene-3-carboxylate