Abstract: The present invention relates to a sesamol derivative or its salt, and a skin external composition containing the same. More particularly, the invention relates to a sesamol derivative or its salt, which consists of sesamol and 3-aminopropane phosphoric acid, linked with each other by a phosphoric acid diester bond, and can be degraded into sesamol and 3-aminopropane phosphoric acid by enzymes present on the skin so as to simultaneously show the physiological activities of sesamol and 3-aminopropane phosphoric acid, as well as a preparation method thereof and a skin external composition containing the same.

Abstract: The present invention relates to a sesamol derivative or its salt, and a skin external composition containing the same. More particularly, the invention relates to a sesamol derivative or its salt, which consists of sesamol and 3-aminopropane phosphoric acid, linked with each other by a phosphoric acid diester bond, and can be degraded into sesamol and 3-aminopropane phosphoric acid by enzymes present on the skin so as to simultaneously show the physiological activities of sesamol and 3-aminopropane phosphoric acid, as well as a preparation method thereof and a skin external composition containing the same.

Abstract: The present invention provides hydroxamic acid derivatives represented by the formula, having antioxidation, collagen biosynthesis promotion and skin pore contraction effects, and a method for preparation thereof. Further, the present invention provides skin-care external compositions for preventing skin aging, containing said hydroxamic acid derivatives represented by the formula as an active ingredient.

Abstract: Disclosed is a kaempferol preparing method comprising isolating kaempferol from kaempferol glucosides using an acid, a base, an enzyme or a microbe producing the enzyme. More specifically, the method comprises obtaining a plant extract containing kaempferol glycosides from a plant using water or an organic solvent; and hydrolyzing the plant extract using an acid, a base, an enzyme or a microbe producing the enzyme to isolate kaempferol. The kaempferol glycosides comprise camelliaside A or camelliaside B. The plant extract is derived from a seed or leaf of green tea. When using the method of the invention, it is possible to mass-produce kaempferol, which is one of main physiological activating ingredients, from a plant, particularly a seed or leaf of green tea.

Abstract: Disclosed is a hydroxybenzamide derivative represented by the following Formula. A method for preparing the same and a cosmetic composition comprising the same are also disclosed. More particularly, the hydroxybenzamide derivative is obtained by reacting a hydroxybenzoic acid having a protecting group introduced thereto with a hydroxyphenyl amine to form a benzamide derivative and by hydrolyzing the benzamide derivative in an aqueous base solution to form a hydroxybenzamide derivative. The cosmetic composition comprising the hydroxybenzamide derivative as an active ingredient has excellent anti-oxidative, anti-aging and skin wrinkle-alleviating effects. wherein R1 represents a C1˜C10 alkyl group, and n is an integer ranging from 1 to 3.

Abstract: The present invention provides hydroxamic acid derivatives represented by the formula, having antioxidation, collagen biosynthesis promotion and skin pore contraction effects, and a method for preparation thereof. Further, the present invention provides skin-care external compositions for preventing skin aging, containing said hydroxamic acid derivatives represented by the formula as an active ingredient.

Abstract: The present invention provides hydroxamic acid derivatives which have anti-aging efficacy and a method for preparation thereof. It is further provided skin-care external compositions for preventing skin aging, containing the hydroxamic acid derivatives represented by the formula (I) as an active ingredient.

Abstract: The present invention provides hydroxamic acid derivatives represented by the following formula (I), having anti-aging efficacy and a method for preparation thereof: wherein, R1 is herein, R5 and R6 each independently represents a hydrogen atom, a C1-C10 alkyl group or a C3-C6 cyclic alkyl group; R2 is CONH, NHCO, CONR7 or NR7CO, herein, R7 represents a C1-C10 alkyl group; R3 is —(CH)n—, herein, n=0 or 1; and R4 is a hydrogen atom or a C1-C10 alkyl group. Further, the present invention provides skin-care external compositions for preventing skin aging, containing said hydroxamic acid derivatives represented by the formula (I) as an active ingredient.

Abstract: There are provided thermotropic liquid crystal polymer microcapsules which can show behavior of liquid crystal as it is within polymer phase due to phase separation between liquid crystal and polymer, so to be incorporated into cosmetic composition as an additive for visual effect, and in loading active ingredients within liquid crystal, can improve the stability of the active ingredients in cosmetic base; and a method for preparing the same; and cosmetic compositions containing the same.

Abstract: The present invention provides hydroxy pyranone derivatives and a method for preparing the hydroxy pyranone derivatives. The hydroxy pyranone derivatives of the present invention are significantly effective in promoting the biosynthesis of collagen and in inhibiting the activity of collagenase, i.e. an enzyme for decomposing collagen, to have anti-wrinkle efficacy, and can be incorporated into medicines or external applications for lessening skin-wrinkles.

Abstract: The present invention provides hydroxy pyranone derivatives and a method for preparing the hydroxy pyranone derivatives. The hydroxy pyranone derivatives of the present invention are significantly effective in promoting the biosynthesis of collagen and in inhibiting the activity of collagenase, i.e. an enzyme for decomposing collagen, to have anti-wrinkle efficacy, and can be incorporated into medicines or external applications for lessening skin-wrinkles.

Abstract: There are provided thermotropic liquid crystal polymer microcapsules which can show behavior of liquid crystal as it is within polymer phase due to phase separation between liquid crystal and polymer, so to be incorporated into cosmetic composition as an additive for visual effect, and in loading active ingredients within liquid crystal, can improve the stability of the active ingredients in cosmetic base; and a method for preparing the same; and cosmetic compositions containing the same.

Abstract: A ceramide-like compound having properties of the natural ceramides are represented by the following formula (I), and a method for producing the same , and a cosmetic composition containing the same as an active ingredient:

Abstract: Disclosed herein is a ceramide-like compound having properties of the natural ceramides and represented by the following formula (I), and a method for producing the same, and a cosmetic composition containing the same as an active ingredient.

Abstract: Disclosed herein is a method for preparing 3-aminopropane phosphoric acid represented by the formula (I), comprising the steps of (a) reacting 3-amino-1-propanoi with phosphorus oxychloride at a low temperature, and (b) hydrolyzing the product of the step (a) in the presence of an acidic catalyst, and a cosmetic composition containing 3-aminopropanic phosphoric acid or its salts as an active ingredient.