U-49900 is a designer medicine that has a place with the class of narcotic arrangements. The IUPAC name of the substance is trans-3,4-dichloro-N-[2-(diethylamino)cyclohexyl]-N-methyl-benzamide. The atomic recipe of this crystalline strong compound is C18H26Cl2N2O. The immaculateness of this substance is over 98%. The recipe weight of U-49900 is 357.3 g/mol.