Abstract: Disclosed is a composition for promoting a production of hyaluronic acid containing at least one of kaempferol and quercetin. Kaempferol and quercetin of the invention increase an expression of a hyaluronic acid synthase (HAS) gene existing in a skin cell line of human epidermis, thereby promoting a production of hyaluronic acid in the human cell. Accordingly, the composition containing at least one of kaempferol and quercetin according to the invention can be usefully used as a cosmetic composition for increasing skin elasticity and preventing skin dryness or aging, or a pharmaceutical composition for treating or preventing a degenerative arthritis.

Abstract: Disclosed is a composition for promoting a production of hyaluronic acid containing at least one of kaempferol and quercetin. Kaempferol and quercetin of the invention increase an expression of a hyaluronic acid synthase (HAS) gene existing in a skin cell line of human epidermis, thereby promoting a production of hyaluronic acid in the human cell. Accordingly, the composition containing at least one of kaempferol and quercetin according to the invention can be usefully used as a cosmetic composition for increasing skin elasticity and preventing skin dryness or aging, or a pharmaceutical composition for treating or preventing a degenerative arthritis.

Abstract: The present invention provides a menthol derivative represented by the following Formula 1 and a method for preparing the menthol derivative. The menthol derivative represented by the Formula 1 is prepared by reacting menthol and phosphorous oxychloride with an equivalence ratio of 1:1˜1.3 in an organic solvent in the presence of organic base to obtain dichloro[5-methyl-2(mehtylethyl)cylclohexyloxy]phosphino-1-one; and reacting above obtained dichloro[5-methyl-2(mehtylethyl)cylclohexyloxy]phosphino-1-one with 3-amino propanol in the organic solvent in the presence of the organic; then hydrolyzing and crystallizing the product with polar organic solvent.

Abstract: The present invention provides a menthol derivative represented by the following Formula 1 and a method for preparing the menthol derivative. The menthol derivative represented by the Formula 1 is prepared by reacting menthol and phosphorous oxychloride with an equivalence ratio of 1:1˜1.3 in an organic solvent in the presence of organic base to obtain dichloro[5-methyl-2(mehtylethyl)cylclohexyloxy] phosphino-1-one; and reacting above obtained dichloro[5-methyl-2(mehtylethyl) cylclohexyloxy]phosphino-1-one with 3-amino propanol in the organic solvent in the presence of the organic; then hydrolyzing and crystallizing the product with polar organic solvent.