Well, norphenephrine aka norphenylephrine is just one of several noepinephrine catecholamines. It also goes by the name m-octopamine.
M-octopamine (I assume can come from tyramine and can be metabolized into synephrine) is a partial alpha1A and alpha1B agonist. Yeah, but that's in vitro and probably useless to us people... lol, or any mammals for that matter.
I',m not gonna bother looking into this one too much. I'm going out on a limb and assuming that simply getting pure phenephrine... which is OTC... would be more effective. More effective still is the classic and well loved stuf we all once knew... it's out there if you know where to look. I'm talking about ephedrine. Or anything in that realm as it isn't hard at all to find a chem house that supplies it. And there's always "research".
If I were you, I'd just stick to what CNW provides in bulk: EGCG, raspberry ketones, caffeine, tyramine, forskolin, etc etc ...