1H-Thieno[2,3-c][1,2]thiazin-4(3H)-one, 1,5,6-trimethyl-, 2,2-dioxide175202-79-6100 % similar Ethyl 2-amino-4,5-dimethyl3-thenoate4815-24-131 % similar 2-Amino-4,5-dimethyl-thiophene-3-carboxylic acid methyl ester4651-93-831 % similar