139326-29-7 Pyrido[3',2':4,5]Thieno[2,3-E]-1,2,4-Triazolo[4,3-C]Pyrimidine-3-Carboxyli C Acid, 7,8,9-Trimethyl-, Ethyl Ester 139326-26-4 Pyrido[3',2':4,5]Thieno[2,3-E]-1,2,4-Triazolo[4,3-C]Pyrimidine, 3,7,8,9-Tetramethyl- 139326-30-0 Pyrido[3',2':4,5]Thieno[2,3-E]-1,2,4-Triazolo[4,3-C]Pyrimidine-3-Acetic Acid, 7,8,9-Trimethyl-, Ethyl Ester