| abstract |
wherein R1 is C5-26-alkyl, C5-26-alkenyl, C5-26-alkynyl or a polyunsaturated aliphatic carbon group having 5 to 26 carbon atoms and comprising at least two unsaturations selected from double and triple links; R2 represents a hydrogen atom or a C1-6-alkyl group; R3 represents a hydrogen atom or a C1-3-alkyl group; R4 represents a hydrogen atom or a C1-4-alkyl, C3-7-cycloalkyl, C3-7-cycloalkyl-C1-3-alkyl group; in the basic state, of hydrate or of solvate.Procedure of preparation and application in therapeutics. |