Photoresist Chemicals 1H-Purine-2,6-dione, 3-butyl-8-chloro-3,9-dihydro-1-[4-[5-(1H-pyrazol-3-yl)-1,2,4-oxadiazol-3- yl]butyl]- Cas：925249-80-5 Molecular Formula：C18H21ClN8O3