(1.)
Phenylethylamine - inactive
(2.) (R)-
Beta-Methylphenylethylamine, - Amphetamine analog. "betphetamine" 1/3x as potent and probably not as recreational. Fastandbulbous reported it's a good decongestant but otherwise shitty. Pop culture ref: This is the drug H.D. Case uses in Neuromancer.
(3.)
Methylsynephrine, - Oxilofrine, para-hydroxyephedrine. Ephedrine analog
(4.) N-Methyl-B-Methylphenylethylamine, - N-methyl analog of (2), decongestant.
(5.) N-Methyl-Phenylethylamine - N methyl analog of (1), inactive.
(6.) N-Benzyl-Alpha-Phenylethylamine - N benzylated prodrug for (1). Likely inactive
[...]
(7.) Theobromine - xanthine vasodialator & cardiostimulant found in cocoa. Caffeine metabolite
(8.) Alpha-Phenylethylamine HCL, same as (1)
(9.)
Synephrine HCl - adrenergic alkaloid found in bitter orange and some mandarin oranges. "iso-
phenylepherine". Cardiostimulant and adrenergic. May be a decongestant, but likely to be a crappy one
(10.)
5-Methoxytryptamine HCL - "Mexamine". Supposedly protects vs radiation damage. Melatonin precursor/metabolite. It's doubtful it's active, especially orally - tryptamine itself is not even active IV.
(11.),
L-Tyrosine Ethyl Ester HCL - prodrug for tyrosine? Converted to tyrosine and ethanol in the huamn body. Probably has no effect, assuming you eat any protien in your diet at all...
(12.)
Yohimbine HCL - this is concerning, yohimbine is a strong adrenergic autoreceptor antagonist, it makes your body release large amounts of norepinephrine and adrenaline and can cause panic attacks, hypertension, etc. Most people find it to be an "unpleasant" stimulant. Active component of the herbal preparation yohimbe. Some people think it's a mild MAOI but I think it just doesn't play well withother drugs at all.
(13.)
Caffeine (Anhydrous): 200 mg - Xanthine stimulant. 200mg is a fairly high dose - similar to an entire can of strong energy drink or two-and-a-half Red Bulls.
I wouldn't take more than one of these pills at once. In fact I wouldn't take any of them - they look like someone's lumped together every legal thing that looks structurally close to amphetamine or ephedrine together. Half the compounds are inactive, half are crappy stimulants that primarily raise heart rate and blood pressure, one is a very unpleasant stimulant (yohimbine) and one is a massive dose of a strong stimulant (caffeine). It's a recipe for elevated blood pressure, panic attacks, nausea etc. - or worse heart attacks/strokes/hyperthermia.
Stick to caffeine pills. They're probably cheaper too