Photoresist Chemicals Methanone, (5-chloro-1,3-dimethyl-1H-pyrazol-4-yl)phenyl-, O-[2-hydroxy-3-[4-(2-methoxyphenyl)-1-piperazinyl]propyl]oxime, trihydrochloride Cas:67612-39-9 Molecular Formula:C26H32ClN5O3.3ClH