Right - update apparently the active metabolite is alpha methylnoradrenaline, but as the metabolic pathway would be
Alphamethyl DOPA ----> alphamethyldopamine ---->alphamethylnoradrenaline
via the same enzymes that are responsible for dopamine & noradrenaline biosynthesis (DOPA decarboxylase & dopamine hydroxylase).
As an intermediate metabolite for the active end drug, you can't really call alphamethyldopamine a very minor metabolite of alphamethylDOPA as it's conversion to the intermediate metabolite is essential for the final drug action.
This also means that any alphamethyldopamine produced from the metabolism of MDA/MDMA is going to largely end up as alphamethylnoradrenaline. Looking at the SPC sheet for aldomet, theres a striking resemblance of the side effects to those of a pills comedown.
If anybody can find how long it takes to clear the false neurotransmitter from being used at the synapses in place of noradrenaline, that might account for the length of time that the 'Tuiesday blues' last for.