2,4,6,8-tetra-oxo-3,7-diaza bicyclo-(3,3,1)-nonane compounds

Abstract From the Canadian patent

A compound corresponding to the formula: (Vb), wherein, R1 and R2 independently from each other denote hydrogen a substituent which contains up to 12 carbon atoms and which is selected from the group consisting of alkyl alkenyl, and alkinyl, or a cycloalkyl group containing 3 to 6 carbon atoms which is attached to the nitrogen atom directly or by an alkylene group containing 1 to 3 carbon atoms, and R3 and R4 each denotes an alkyl group containing 1 to 7 carbon atoms, or both together form an alkylene chain represented by the formula -(CH2)n- wherein n is an integer ranging between 3 and 6, with the proviso that when R1 and R2 each are hydrogen, R3 and R4 do not denote methyl and do not …