abstract |
A mixture of at least four alkadieneamides, each of which is defined by the following structure: (See formula) in which R represents n-C1-2 alkyl, R1 is 2-methyl-1-propyl and R2 is hydrogen, or R1 and R2 together form a residue having the formula - (CH2) n- in which n is 4 0 5. |