4-methyl-3-(3-methyl-but-2-enyl)-cyclohex-4-ene-1,2-dicarboxylic acid anhydride

1-ethyl-2,3,6-trimethylbenzene

3-methyl-1-(2,3,4-trimethyl-phenyl)-but-2-en-1-one

4-acenaphthen-3-yl-4-oxo-butyric acid

(3-苊并基)丙酸