2,3-Dimethyl-4-(2,6,6-trimethyl-1-cyclohexenyl)-2-butenal

2,3-dimethyl-4-(2,6,6-trimethyl-1-cyclohexen-1-yl)-2-butenal

2,3-Dimethyl-4-(2,2,6-trimethyl-5-cyclohexenyl-1)-2-buten-1-al