Abstract: A compound has a tetra-hydroquinoline skeleton, the compound having inhibitory action against ferroptosis, and exerting therapeutic or preventive effect on diseases, disorders or syndromes related to ferroptosis inhibition, such as multiple sclerosis.

Abstract: A therapeutic agent or a preventive agent for alopecia areata has an ROR? antagonistic activity, and, there is a therapeutic agent or a preventive agent for alopecia areata, including a cyclic amine derivative typified by the following compound or a pharmacologically acceptable salt thereof as an active ingredient.

Abstract: A therapeutic agent or a preventive agent for alopecia areata has an ROR? antagonistic activity, and, there is a therapeutic agent or a preventive agent for alopecia areata, including a cyclic amine derivative typified by the following compound or a pharmacologically acceptable salt thereof as an active ingredient.

Abstract: A compound has retinoid-related orphan receptor ? antagonist activity and shows a therapeutic effect or a preventive effect on autoimmune diseases such as multiple sclerosis or psoriasis or allergic diseases, including allergic dermatitis or the like, such as contact dermatitis or atopic dermatitis. The cyclic amine derivative is represented by the formula or a pharmacologically acceptable salt thereof.

Abstract: A compound has retinoid-related orphan receptor ? antagonist activity and shows a therapeutic effect or a preventive effect on autoimmune diseases such as multiple sclerosis or psoriasis or allergic diseases, including allergic dermatitis or the like, such as contact dermatitis or atopic dermatitis. The cyclic amine derivative is represented by the formula or a pharmacologically acceptable salt thereof.

Abstract: A method of treating or preventing multiple sclerosis includes administering a therapeutically effective amount of a cyclohexane derivative represented by Formula (I): wherein A is a substituent represented by Formula (IIa) or (IIb): R1 and R2 are each independently a hydrogen atom, chlorine atom, C1-C3 haloalkyl, C1-C4 alkyl, C1-C4 alkoxy, or cyano; R3 is a hydrogen atom or chlorine atom; R4 is a fluorine atom, hydroxymethyl, or hydroxyl; R5 and R6 are each independently a hydrogen atom, fluorine atom, C1-C3 haloalkyl, carboxyl, methoxycarbonyl, ethoxycarbonyl, C1-C4 alkoxy, hydroxyl, or C2-C5 alkylcarbonyloxy, or optionally together form oxo; R7 and R8 are each independently a hydrogen atom or fluorine atom; Y is an oxygen atom or sulfur atom; and Z is a nitrogen atom or methine or a pharmaceutically acceptable salt thereof to a mammal.

Abstract: A method of treating or preventing multiple sclerosis includes administering a therapeutically effective amount of a cyclohexane derivative represented by Formula (I): wherein A is a substituent represented by Formula (IIa) or (IIb): R1 and R2 are each independently a hydrogen atom, chlorine atom, C1-C3 haloalkyl, C1-C4 alkyl, C1-C4 alkoxy, or cyano; R3 is a hydrogen atom or chlorine atom; R4 is a fluorine atom, hydroxymethyl, or hydroxyl; R5 and R6 are each independently a hydrogen atom, fluorine atom, C1-C3 haloalkyl, carboxyl, methoxycarbonyl, ethoxycarbonyl, C1-C4 alkoxy, hydroxyl, or C2-C5 alkylcarbonyloxy, or optionally together form oxo; R7 and R8 are each independently a hydrogen atom or fluorine atom; Y is an oxygen atom or sulfur atom; and Z is a nitrogen atom or methine or a pharmaceutically acceptable salt thereof to a mammal.

Abstract: A therapeutic or prophylactic agent for multiple sclerosis includes as an effective component a cyclohexane derivative represented by Formula (I): wherein A is a substituent represented by Formula (IIa) or (IIb): R1 and R2 are each independently a hydrogen atom, chlorine atom, C1-C3 haloalkyl, C1-C4 alkyl, C1-C4 alkoxy, or cyano; R3 is a hydrogen atom or chlorine atom; R4 is a fluorine atom, hydroxymethyl, or hydroxyl; R5 and R6 are each independently a hydrogen atom, fluorine atom, C1-C3 haloalkyl, carboxyl, methoxycarbonyl, ethoxycarbonyl, C1-C4 alkoxy, hydroxyl, or C2-C5 alkylcarbonyloxy, or optionally together form oxo; R7 and R8 are each independently a hydrogen atom or fluorine atom; Y is an oxygen atom or sulfur atom; and Z is a nitrogen atom or methane or a pharmaceutically acceptable salt thereof.