(−)-Bis-(3-acetoxyundec-5-enyl) disulphide and S-(−)-3-acetoxyundec-5-enyl thioacetate, possible precursors to undeca-1,3,5-trienes in Dictyopteris - Moore, R E; Mistysyn, J; Pettus, J A, jr. (Chem Commun, 1972)