4B-MAR 

4B-MAR Powder (4′-Bromo-4-methylaminorex) is a designer drug from the substituted aminorex family, first definitively identified in Austria in January 2022. It is a synthetic stimulant research chemical structurally related to 4-methylaminorex (4-MAR), featuring a bromine atom at the 4′ position of the phenyl ring. While its pharmacological activity has not been extensively reported, it is believed to have stimulant effects similar to related aminorex derivatives. 4B-MAR is intended exclusively for scientific research and analytical purposes. 4-Bromo-4-methylaminorex (other names: 4B-4-MAR, 4B-MAR) is a stimulant of the 2-amino-5-aryloxazoline class, a metabolite of aminorex (a stimulant first synthesized in 1960 by McNeil Laboratories). This substance has properties and effects similar to methamphetamine, but with a longer duration of action.

Chemistry
4-Bromo-4-methylaminorex is a structural brominated metabolite of aminorex.

Chemical Structure / Physical Properties

• Chemical Name: 4′-Bromo-4-methylaminorex

• Molecular Formula: C10H11BrN2O

• Molecular Weight: 255.12 g/mol

• Purity: Typically ≥98%

• Form: Powder

• Color/Appearance: White to off-white crystalline powder

• Structural Features: Contains an oxazoline ring with a methyl substitution at the 4-position and a bromine atom at the para position of the phenyl ring

• Related Compounds: 4-Methylaminorex (4-MAR), 4C-MAR, 4F-MAR

Pharmacology
4B-MAR is a designer substance whose toxicological and pharmacological properties are not fully understood. All data presented are from observational and chemical studies in mice.
4B-MAR induces effects such as stimulation, concentration, euphoria. The time of action of the drug is up to 16 hours, higher dosages are effective up to 36 hours.

Legal status
May not be legal in countries where aminorex analogs are legally controlled.

Technical Information:

Product Name: 4B-MAR
Other Name(s): 4-Bromo-4-methylaminorex, 4B-4-MAR
IUPAC Name: 5-(4-bromophenyl)-4-methyl-4,5-dihydrooxazol-2-amine
CAS:
Molar Mass: 255.12 g/mol
Molecular Formula: C10H11BrN2O
Formulation: A crystalline solid