ethyl 2-iminothieno[3,2-d]-3,1,4-oxathiazepine-7-carboxylate

2-氯-3-甲基噻吩

5-chloro-4-methylthiophen-2-carboxylic acid

5-氯-4-甲基-2-噻吩甲酰氯

5-氯-4-甲基噻吩-2-羧酸乙酯