| abstract |
(57) [Summary] (Modifications) [Problem] To provide a composition for pharmaceuticals, cosmetics, foods, and the like which is excellent in stability, especially at high temperatures around 40 ° C. SOLUTION: The isoleucine derivative represented by the general formula (I) is contained in a composition such as a cosmetic, a medicine, and a food. Embedded image Formula (I) (where R1 represents a hydrogen atom or a benzyloxycarbonyl group capable of having a substituent, and R2 represents a linear or branched alkyl having a cyclic structure having 8 to 22 carbon atoms) And n represents an integer of 1 to 8.) According to the present invention, pharmaceuticals, cosmetics, and the like exhibit excellent stability especially at a body temperature of around 40 ° C. and a usability at 5 to 10 ° C. It is possible to provide a composition such as food. |