The present invention relates to the novel indazole derivatives of general formula (I): ##STR1##

in which: R is either O, S or NH; R3 is an alkyl, aryl, arylalkyl, heteroaryl, heteroarylalkyl, aryl, heterocycle, cycloalkyl, alkenyl, etc. radical; these radicals being optionally substituted with one or more substituents; R4, R5, R6 and R7 are chosen, independently of each other, from the following radicals: hydrogen, halogen, CN, NO₂, NH₂, OH, COOH, C(O)OR8, —O—C(O)R8, NR8R9, NHC(O)R8, C(O)NR8R9, NHC(S)R8, C(S)NR8R9, SR8, S(O)R8, SO₂R8, NHSO₂R8, SO₂NR8R9, trifluoromethyl, trifluoromethoxy, alkyl, alkoxy, aryl, arylalkyl, heteroaryl, heteroarylalkyl, heterocycle, cycloalkyl, alkenyl, etc.; these radicals being optionally substituted with one or more substituents.