Abstract: Provided are an agent for imparting ceramide-like function, an agent for reinforcing skin barrier function, a moisturizing agent and a skin drug for external use. The agent for imparting ceramide-like function comprises as an effective ingredient a derivative of succinic acid diamide represented by the following formula (1): [wherein R1 and R2 each independently represents a hydroxyalkyl group of from 1 to 6 carbon atoms, R3 represents a group: —CH2CH2CH2CH2—R4 or a group: —CH2CH?CHCH2—R4 (wherein R4 represents an alkyl group of from 8 to 26 carbon atoms)].

Abstract: A transglutaminase activator containing at least one kind selected from the group consisting of an extract from Justicia procumbens, an extract from Peristrophe japonica, and a compound represented by Formula (1), as an active ingredient: wherein R1 and R2 represent a hydrogen atom, a hydroxyl group, or an alkoxy group having 1 to 4 carbon atoms; R3 represents a hydrogen atom, or a group for forming a methylenedioxy group by bonding with R2; R4 and R5 represent a hydrogen atom, or a group for forming a methylenedioxy group by bonding with each other; R6 represents a hydrogen atom, a hydroxyl group, an alkoxy group having 1 to 5 carbon atoms, an acyloxy group having 1 to 4 carbon atoms, or a specific sugar residue.

Abstract: A ceramide production enhancer and a moisturizer containing, as an active ingredient, an extract of at least one plant selected from the group consisting of Chenopodium hybridum, Melia toosendan, Indigofera tinctoria, Cirsium japonicum, Catalpa ovata, and Tagetes erecta, or a compound represented by the following Formula (1): wherein, R represents an acyl group having 1 to 5 carbon atom(s).

Abstract: A ceramide production enhancer and a moisturizer containing, as an active ingredient, an extract of at least one plant selected from the group consisting of Chenopodium hybridum, Melia toosendan, Indigofera tinctoria, Cirsium japonicum, Catalpa ovata, and Tagetes erecta, or a compound represented by the following Formula (1): wherein, R represents an acyl group having 1 to 5 carbon atom(s).

Abstract: A ceramide production enhancer and a moisturizer containing, as an active ingredient, an extract of at least one plant selected from the group consisting of Chenopodium hybridum, Melia toosendan, Indigofera tinctoria, Cirsium japonicum, Catalpa ovate, and Tagetes erecta, or a compound represented by the following Formula (1): wherein, R represents an acyl group having 1 to 5 carbon atom(s).

Abstract: Provided are an agent for imparting ceramide-like function, an agent for reinforcing skin barrier function, a moisturizing agent and a skin drug for external use. The agent for imparting ceramide-like function comprises as an effective ingredient a derivative of succinic acid diamide represented by the following formula (1): [wherein R1 and R2 each independently represents a hydroxyalkyl group of from 1 to 6 carbon atoms, R3 represents a group: —CH2CH2CH2CH2—R4 or a group: —CH2CH?CHCH2—R4 (wherein R4 represents an alkyl group of from 8 to 26 carbon atoms)].

Abstract: A transglutaminase activator containing at least one kind selected from the group consisting of an extract from Justicia procumbens, an extract from Peristrophe japonica, and a compound represented by Formula (1), as an active ingredient: wherein R1 and R2 represent a hydrogen atom, a hydroxyl group, or an alkoxy group having 1 to 4 carbon atoms; R3 represents a hydrogen atom, or a group for forming a methylenedioxy group by bonding with R2; R4 and R5 represent a hydrogen atom, or a group for forming a methylenedioxy group by bonding with each other; R6 represents a hydrogen atom, a hydroxyl group, an alkoxy group having 1 to 5 carbon atoms, an acyloxy group having 1 to 4 carbon atoms, or a specific sugar residue.

Abstract: Provided are a drug, a cosmetic, etc. for promoting production of ceramide. Provided is a ceramide production promoter including a compound represented by the formula (1) or salts thereof as an active ingredient (in the formula, R1 represents a phosphono group or a hydrogen atom, R2 represents an alkyl group having 8 to 24 carbon atoms or an acyl group having 8 to 24 carbon atoms, and R3 represents an alkyl group having 1 to 24 carbon atoms when R1 represents a phosphono group or represents a phosphono group when R1 represents a hydrogen atom, or a salt thereof as an active ingredient.

Abstract: Provided are a drug, a cosmetic, etc. for promoting production of ceramide. Provided is a ceramide production promoter including a compound represented by the formula (1) or salts thereof as an active ingredient (in the formula, R1 represents a phosphono group or a hydrogen atom, R2 represents an alkyl group having 8 to 24 carbon atoms or an acyl group having 8 to 24 carbon atoms, and R3 represents an alkyl group having 1 to 24 carbon atoms when R1 represents a phosphono group or represents a phosphono group when R1 represents a hydrogen atom, or a salt thereof as an active ingredient.

Abstract: A ceramide production enhancer and a moisturizer containing, as an active ingredient, an extract of at least one plant selected from the group consisting of Chenopodium hybridum, Melia toosendan, Indigofera tinctoria, Cirsium japonicum, Catalpa ovate, and Tagetes erecta, or a compound represented by the following Formula (1): wherein, R represents an acyl group having 1 to 5 carbon atom(s).

Abstract: Provided are a drug, a cosmetic, etc. for promoting production of ceramide. Provided is a ceramide production promoter including a compound represented by the formula (1) or salts thereof as an active ingredient (in the formula, R1 represents a phosphono group or a hydrogen atom, R2 represents an alkyl group having 8 to 24 carbon atoms or an acyl group having 8 to 24 carbon atoms, and R3 represents an alkyl group having 1 to 24 carbon atoms when R1 represents a phosphono group or represents a phosphono group when R1 represents a hydrogen atom, or a salt thereof as an active ingredient.

Abstract: The present invention relates to a composition for external application, a humectant and a skin barrier function reinforcing agent, each containing a diamide derivative represented by the following formula (1): (wherein, R1a and R1b are the same or different and each represents a C1-23 hydrocarbon group, R2a and R2b are the same or different and each represents a divalent C1-6 hydrocarbon group, R3s are the same or different and each represents a divalent C2-6 hydrocarbon group and n stands for 1 to 100). The composition for external application, humectant and skin barrier function reinforcing agent basically improve the water retaining ability and barrier functions of the horny layer, are excellent in miscibility and mixing stability and can be prepared efficiently at a low cost.

Abstract: The present invention relates to a composition for external application, a humectant and a skin barrier function reinforcing agent, each containing a diamide derivative represented by the following formula (1): (wherein, R1a and R1b are the same or different and each represents a C1-23 hydrocarbon group, R2a and R2b are the same or different and each represents a divalent C1-6 hydrocarbon group, R3s are the same or different and each represents a divalent C2-6 hydrocarbon group and n stands for 1 to 100). The composition for external application, humectant and skin barrier function reinforcing agent basically improve the water retaining ability and barrier functions of the horny layer, are excellent in miscibility and mixing stability and can be prepared efficiently at a low cost.

Abstract: The present invention relates to a dermatologic preparation containing a diamide derivative represented by the following formula (1): (wherein, R1 represents a linear or branched hydrocarbon group having 1 to 22 carbon atoms which may be substituted by one or more hydroxy and/or alkoxy groups, R2 represents a linear or branched divalent hydrocarbon group having 1 to 12 carbon atoms, and R3 represents a linear or branched divalent hydrocarbon group having 1 to 42 carbon atoms). This diamide derivative (1) is capable of fundamentally improving the water retention capacity and barrier functions of the horny layer, is excellent in miscibility and mixing stability and can be prepared efficiently at a low cost.

Abstract: The present invention relates to a composition for external application, a humectant and a skin barrier function reinforcing agent, each containing a diamide derivative represented by the following formula (1): (wherein, R1a and R1b are the same or different and each represents a C1-23 hydrocarbon group, R2a and R2b are the same or different and each represents a divalent C1-6 hydrocarbon group, R3s are the same or different and each represents a divalent C2-6 hydrocarbon group and n stands for 1 to 100). The composition for external application, humectant and skin barrier function reinforcing agent basically improve the water retaining ability and barrier functions of the horny layer, are excellent in miscibility and mixing stability and can be prepared efficiently at a low cost.

Abstract: The present invention relates to a composition for external application, a humectant and a skin barrier function reinforcing agent, each containing a diamide derivative represented by the following formula (1): (wherein, R1a and R1b are the same or different and each represents a C1-23 hydrocarbon group, R2a and R2b are the same or different and each represents a divalent C1-6 hydrocarbon group, R3s are the same or different and each represents a divalent C2-6 hydrocarbon group and n stands for 1 to 100). The composition for external application, humectant and skin barrier function reinforcing agent basically improve the water retaining ability and barrier functions of the horny layer, are excellent in miscibility and mixing stability and can be prepared efficiently at a low cost.

Abstract: The present invention relates to a composition for external application, a humectant and a skin barrier function reinforcing agent, each containing a diamide derivative represented by the following formula (1): 1

Abstract: The present invention relates to a dermatologic preparation containing a diamide derivative represented by the following formula (1): 1

Abstract: The present invention relates to a dermatologic preparation containing a diamide derivative represented by the following formula (1): (wherein, R1 represents a linear or branched hydrocarbon group having 1 to 22 carbon atoms which may be substituted by one or more hydroxy and/or alkoxy groups, R2 represents a linear or branched divalent hydrocarbon group having 1 to 12 carbon atoms, and R3 represents a linear or branched divalent hydrocarbon group having 1 to 42 carbon atoms). This diamide derivative (1) is capable of fundamentally improving the water retention capacity and barrier functions of the horny layer, is excellent in miscibility and mixing stability and can be prepared efficiently at a low cost.

Abstract: The present invention relates to a composition for external application, a humectant and a skin barrier function reinforcing agent, each containing a diamide derivative represented by the following formula (1): 1