One aspect of the invention relates to the use of a compound of formula (I) or a pharmaceutically acceptable salt or solvate thereof as a medicament, wherein: ring A is a 5- or 6-membered aromatic ring or heteroaromatic ring, wherein the aromatic ring or heteroaromatic ring is optionally selected from F, Cl, Br, I, CN, alkoxy, NR 11 R 11 One or more substituents of ', OH,
alkyl, haloalkyl, aralkyl,
aryl, and heteroaryl, wherein said
aryl and heteroaryl substituents are optionally each independently selected from F, Cl, Br, I, CN, alkoxy, NR 11 R 11 One or more substituents selected from ', OH,
alkyl, haloalkyl, and aralkyl; Y is selected from C=N-OH and CR 10 R 10' , where R 10 and R 10' Each is independently selected from H, F,
alkyl, and haloalkyl; R1, R4, and R5 are each independently selected from H, F, Cl, Br, and I; R2 and R3 are each independently selected from H, F, Cl, Br, I, CN, methoxy, and haloalkyl; and R 11 and R 11 Each is independently selected from H, alkyl, haloalkyl, COR 12 and SO2R 13 , where R 12 and R 13 All are alkyl groups. The invention also relates to the use of compounds of formula (I) in immuno-
oncology,
immunology, and related applications, as well as to compounds of formula (I) themselves.