Oxidative degradation of C27-phthienoic acid has established beyond any reasonable doubt the structure, 2, 4, 6,-trimethyl-2-tetracosenoic acid, in agreement with the previous structural assignment by other investigators. One degradative method consisted of allylic bromination of the α, β-unsaturated acid, dehydrohalogenation, ozonolysis, and oxidation with cold permanganate. A new method of degradation of hydrocarbon chains, depending ...