Photoresist Chemicals 1H-Pyrazolo[3,4-b]pyridine-5-methanaminium, 4-(5-bromo-3-pyridinyl)-6-cyclopentyl-N,N,N,1-tetraethyl-, sulfate (2:1) Cas：872683-16-4 Molecular Formula：C25H35BrN5.1/2O4S