4,4,4',4',6,6,6',6'-octamethylspiro[5H-1,3-benzoxaselenole-2,3'-cyclohexane]-1',2',7-trione

3,3,5,5-tetramethylcyclopentene-1-carboxylic acid

3,3,5,5-四甲基-1,2-环戊烷二酮

2-hydroxy-3-(2-hydroxy-4,4,6,6-tetramethyl-3-oxocyclohexen-1-yl)selanyl-4,4,6,6-tetramethylcyclohex-2-en-1-one

2-hydroxy-2-methoxy-4,4,6,6-tetramethylcyclohexane-1,3-dione