Photoresist Chemicals 2H-Pyran-2-one, 5,6-dihydro-6-[(1E)-2-[(4R,5R)-5-[(2R,3Z)-2-hydroxy-4-iodo-3-butenyl]- 2,2,4-trimethyl-1,3-dioxolan-4-yl]ethenyl]-, (6R)- Cas:872693-69-1 Molecular Formula:C17H23IO5