Photoresist Chemicals 2H-Pyran-2-one,tetrahydro-4-hydroxy-6-[4,8,12-trihydroxy-15-(hydroxymethyl)-11,13,17,19,21-pentamethyl-1,5,9,13,15-tricosapentaenyl]-(9CI) Cas：83652-16-8 Molecular Formula：C34H56 O7