Buy 4-MAR Online4-Methylaminorex Drug Description Description4-Methylaminorex is a stimulant drug of the 2-amino-5-aryloxazoline class that was first synthesized in 1960 by McNeil Laboratories. It is also known by its street names "U4Euh" and "Ice". It is banned in many countries as a stimulant. Formula: C10H12N2O CAS ID: 3568-94-3 ChemSpider ID: 83237 Elimination half-life: 10-19 hours DrugBank: DB01447 Metabolism: Hepatic PubChem CID: 92196