Photoresist Chemicals 2-Cyclopenten-1-one, 2-[6-[2-(5,8-dihydro-3,5,5,8,8-pentamethyl-2-naphthalenyl)-1,3-dioxolan -2-yl]-3-pyridinyl]-3-hydroxy- Cas：819866-73-4 Molecular Formula：C28H31NO4