Abstract 5, 6, 7-Trimethylocta-2, 5-dien-4-one (3) was suspected of being a trace component smelling of damascone in a crude complex reaction product. Although this trace component eventually turned out to be the constitutional isomer 2-methyl-3-isopropylhepta-2, 5-dien-4- one (4), the title compound 3 was found to possess even superior fruity, rosy odor characteristics, reminiscent of apples, plums, raisins and other dried fruits, and these odor ...
