3,3,6,6,8,8-hexamethyl-7-(2',2',5',5'-tetramethyl-3,4-dihydroxycyclopentylidene)-2,4-dioxabicyclo(3.3.0)octane

3-(3,4-dihydroxy-2,2,5,5-tetramethylcyclopentylidene)-2,2,4,4-tetramethylpentanedial