Photoresist Chemicals Benzonitrile, 2-[[7-(2-butynyl)-2,3,6,7-tetrahydro-3-methyl-2,6-dioxo-8-(1-piperazinyl)- 1H-purin-1-yl]methyl]- Cas：586401-82-3 Molecular Formula：C22H23N7O2