Don't quote me, but "1,3 Dimethyl" doesn't seem to be one of the synonyms associated with DMMA.
1,3-Dimethylamylamine, 1,3-Dimethyl-5-Amine, 1,3-Dimethylamylamine HCL, 1,3 Dimethylpentylamine, 1,3-dimethylpentylamine, 2-amino-4-methylhexane, 4-methyl-2-hexanamine, 4-methyl-2-hexyl-amine...