507472-79-9
3-amino-5-(thiophen-3-yl)thiophene-2-carboxylic acid
→
354812-17-2
3-amino-5-thiophen-3-ylthiophene-2-carboxamide
175137-07-2
3-氨基-5-(噻吩-3-基)噻吩-2-羧酸甲酯