Compounds of general formula where: - X, at ortho, meta or para position, represents -H, -OH, -NH 2, a halogen atom, an alkyl radical formed of a carbon chain having 1 to 10 carbon atoms, straight-chain or branched, an alkoxy radical, a cycloalkyl having 3 to 8 carbon atoms or an aryl group; - R 8, at ortho, meta or para position, on a carbon differing from that carrying the radical X, represents: -(C=O)-NH-R 1, -(C=O)-O-R 1 or -NH-(C=O)-R 1; - W is -H, -OH, -NH 2 or a halogen atom; - R 1, R 2 and R 3, the same or different, are each independently: ∘ a hydrogen atom; or ∘ an alkyl group formed of a carbon chain having 1 to 10 carbon atoms, straight-chain or branched, optionally unsaturated with one or more double or triple bonds, optionally substituted by one of more heteroatoms, by one or more halogen atoms or by one or more aryl or heteroaryl groups; or ∘ a cycloalkyl having 3 to 8 carbon atoms optionally substituted by an alkyl radical formed of a carbon chain having 1 to 10 carbon atoms, straight-chain or branched, or by an alkoxy radical; - R 4, R 5, R 6 and R 7, the same or different, are each independently selected from among-H, -Cl, -Br, -I, -CN, -NO 2, an alkyl radical formed of a carbon chain having 1 to 10 carbon atoms, straight-chain or branched, an alkoxy radical or cycloalkyl having 3 to 8 carbon atoms; on the understanding that R 3 and R 4 may be fused so that, together with the carbon and nitrogen atoms adjacent to their carrier quinoline ring, they form a 5 or 6-membered ring; for use thereof to treat diseases caused by deranged function or differentiation of osteoblasts and/or by functional imbalance between osteoblasts and osteoclasts, said use allowing the inducing of cell differentiation of stem or progenitor cells. - X, at ortho, meta or para position, represents -H, -OH, -NH 2, a halogen atom, an alkyl radical formed of a carbon chain having 1 to 10 carbon atoms, straight-chain or branched, an alkoxy radical, a cycloalkyl having 3 to 8 carbon atoms or an aryl group; - R 8, at ortho, meta or para position, on a carbon differing from that carrying the radical X, represents: -(C=O)-NH-R 1, -(C=O)-O-R 1 or -NH-(C=O)-R 1; - W is -H, -OH, -NH 2 or a halogen atom; - R 1, R 2 and R 3, the same or different, are each independently: ∘ a hydrogen atom; or ∘ an alkyl group formed of a carbon chain having 1 to 10 carbon atoms, straight-chain or branched, optionally unsaturated with one or more double or triple bonds, optionally substituted by one of more heteroatoms, by one or more halogen atoms or by one or more aryl or heteroaryl groups; or ∘ a cycloalkyl having 3 to 8 carbon atoms optionally substituted by an alkyl radical formed of a carbon chain having 1 to 10 carbon atoms, straight-chain or branched, or by an alkoxy radical; ∘ a hydrogen atom; or ∘ an alkyl group formed of a carbon chain having 1 to 10 carbon atoms, straight-chain or branched, optionally unsaturated with one or more double or triple bonds, optionally substituted by one of more heteroatoms, by one or more halogen atoms or by one or more aryl or heteroaryl groups; or ∘ a cycloalkyl having 3 to 8 carbon atoms optionally substituted by an alkyl radical formed of a carbon chain having 1 to 10 carbon atoms, straight-chain or branched, or by an alkoxy radical; - R 4, R 5, R 6 and R 7, the same or different, are each independently selected from among-H, -Cl, -Br, -I, -CN, -NO 2, an alkyl radical formed of a carbon chain having 1 to 10 carbon atoms, straight-chain or branched, an alkoxy radical or cycloalkyl having 3 to 8 carbon atoms;