| abstract |
The invention relates to compounds of formula (I): wherein: R1 and R2 are independently of one another :. a hydrogen atom ,. a C 1 -C 7 alkyl group optionally substituted with one or more alkoxy groups, R 3 represents a C 1 -C 7 alkyl group, R 4 represents a hydrogen atom, a C 1 -C 4 alkyl group, Y represents a C 1 -C 4 alkoxy group; C4, -NRR ', -O (CH2) nC (O) -NRR' where R and R 'are as defined below and n is an integer of 1 or 2; R "is alkyl C1-C4; andR and R 'independently of one another are hydrogen, -CO-C1-C4 alkyl or -COOR ", where R" as defined above; preparation and application in therapy. |