2-methyl-3-oxo-3,4-dihydro-2H-1,4-benzoxazine-6-carboxylic acid
5-(tert-butoxycarbonylamino)-2-methylthiazole-4-carboxylic acid
METHYL 3-AMINO-4-CYANO-5-(METHYLTHIO)THIOPHENE-2-CARBOXYLATE