Photoresist Chemicals 4H-1-Benzopyran-4-one, 5,7-bis(acetyloxy)-2-[4-(acetyloxy)-3,5-bis(3-methyl-2-butenyl)phenyl]-2, 3-dihydro-8-(3-methyl-2-butenyl)-, (S)- Cas：90686-15-0 Molecular Formula：C36H42O8