(E)-4-(1-Acetyl-2,2-dimethyl-cyclopentyl)-but-3-en-2-on

6,6-二甲基十一烷-2,5,10-三酮

(Z)-4-(1,2,2-Trimethyl-6-oxo-cyclohexyl)but-3-en-2-on

4-(3'-methoxy-3',7',7'-trimethyl-2'-oxa-1'-cycloheptylidene)-2-butanone

(2,2,6-trimethyl-9-oxabicyclo[4.2.1]non-8-en-7-yl) methyl ketone