Acetylene carbamide derivatives, processes for their production, and antioxidants for organic substances which comprise such derivatives as active ingredients

摘要

An acetylene carbamide derivative of the general formula (I): <IMAGE> (I) wherein A represents <IMAGE> wherein R1 represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, is disclosed. A process for producing the acetylene carbamide derivative of the general formula (I) is also disclosed. The acetylene carbamide derivative of the invention is useful as a stabilizer for organic substances from heat and oxidation.