3-ethoxycyclooct-2-en-1-one

3-<((E)-2-methyl-3,5-hexadienyl)oxy>-2-cycloocten-1-one

3-<(3-phenyl-3-butenyl)oxy>-2-cycloocten-1-one

(1R*,8R*,12R*)-13,13-dimethyl-9-oxatricyclo<6.5.0.08,12>tridecan-2-one

(5S*,4R*)-4-(1-methylethenyl)-1-oxaspiro<4.7>dodecan-7-one