4-hydroxy-3,3,6-trimethyl-hept-5-enal cyclohemiacetal

3-甲基-2-丁烯醛

2,2,5,5-tetramethylcyclohex-3-en-1-one

2,2,5,5-四甲基环己烷-1,3-二酮

4-methyl-N-[(Z)-(2,2,5,5-tetramethyl-3-oxocyclohexylidene)amino]benzenesulfonamide