A compound of formula wherein R1 and R2 are each independently selected from the group consisting of H and halogen; (i) R3 is selected from the group consisting of H and C1-4 alkyl and R4 is selected from the group consisting of - phenyl, 6 membered unsaturated, or aromatic heterocycle comprising 1 to 3 heteroatom(s) independently selected from the group consisting of nitrogen, sulfur, and oxygen, and being optionally substituted with one to five substituent(s) independently selected from the group consisting of halogen, CN, C1-4-alkyl, C1-3-(per)haloalkyl, OH, oxo, C1-3-alkoxy, morpholino, C N(C1-3-alkyl) 2 and a 6 membered saturated heterocycle with 1 to 3 heteroatom(s) selected from the group consisting of nitrogen, oxygen and sulfur, optionally substituted with C1-4-alkyl; and - 6 membered saturated heterocycle comprising 1 to 3 heteroatom(s) independently selected from the group consisting of nitrogen, oxygen and sulfur and being optionally substituted with one to three substituent(s) independently selected from the group consisting of halogen, CN, C1-4-alkyl, C1-3-(per)haloalkyl, OH, oxo, and C1-3-alkoxy, or two adjacent substituents may form a 5 or 6 membered saturated fused ring; provided that only one of hydrogens H 1 and H 2 is present at the same time, and the position of the double bonds in the pyrazole ring to which the hydrogens H 1 and H 2 are attached is determined based on which of the hydrogen H 1 and H 2 is present or a pharmaceutically acceptable salt thereof. R1 and R2 are each independently selected from the group consisting of H and halogen; (i) R3 is selected from the group consisting of H and C1-4 alkyl and (i) R3 is selected from the group consisting of H and C1-4 alkyl and R4 is selected from the group consisting of - phenyl, 6 membered unsaturated, or aromatic heterocycle comprising 1 to 3 heteroatom(s) independently selected from the group consisting of nitrogen, sulfur, and oxygen, and being optionally substituted with one to five substituent(s) independently selected from the group consisting of halogen, CN, C1-4-alkyl, C1-3-(per)haloalkyl, OH, oxo, C1-3-alkoxy, morpholino, C N(C1-3-alkyl) 2 and a 6 membered saturated heterocycle with 1 to 3 heteroatom(s) selected from the group consisting of nitrogen, oxygen and sulfur, optionally substituted with C1-4-alkyl; and - 6 membered saturated heterocycle comprising 1 to 3 heteroatom(s) independently selected from the group consisting of nitrogen, oxygen and sulfur and being optionally substituted with one to three substituent(s) independently selected from the group consisting of halogen, CN, C1-4-alkyl, C1-3-(per)haloalkyl, OH, oxo, and C1-3-alkoxy, or two adjacent substituents may form a 5 or 6 membered saturated fused ring; - phenyl, 6 membered unsaturated, or aromatic heterocycle comprising 1 to 3 heteroatom(s) independently selected from the group consisting of nitrogen, sulfur, and oxygen, and being optionally substituted with one to five substituent(s) independently selected from the group consisting of halogen, CN, C1-4-alkyl, C1-3-(per)haloalkyl, OH, oxo, C1-3-alkoxy, morpholino, C N(C1-3-alkyl) 2 and a 6 membered saturated heterocycle with 1 to 3 heteroatom(s) selected from the group consisting of nitrogen, oxygen and sulfur, optionally substituted with C1-4-alkyl; and - 6 membered saturated heterocycle comprising 1 to 3 heteroatom(s) independently selected from the group consisting of nitrogen, oxygen and sulfur and being optionally substituted with one to three substituent(s) independently selected from the group consisting of halogen, CN, C1-4-alkyl, C1-3-(per)haloalkyl, OH, oxo, and C1-3-alkoxy, or two adjacent substituents may form a 5 or 6 membered saturated fused ring; provided that only one of hydrogens H 1 and H 2 is present at the same time, and the position of the double bonds in the pyrazole ring to which the hydrogens H 1 and H 2 are attached is determined based on which of the hydrogen H 1 and H 2 is present or a pharmaceutically acceptable salt thereof.