6-benzothiazolecarboxylic acid, 2-methyl-, ethyl ester InChI=1/C11H11NO2S/c1-3-14-11(13)8-4-5-9-10(6-8)15-7(2)12-9/h4-6H,3H2,1-2H ethyl 2-methyl-1,3-benzothiazole-6-carboxylate