HYDROXAMIC ACID DERIVATIVES AND THE PREPARATION METHOD THEREOF
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...
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Format: | Patent |
Sprache: | eng ; fre ; ger |
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Zusammenfassung: | 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. |
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