abstract |
The present invention relates to compounds of formula (I) and acceptable salts thereof. The present invention also relates to a food composition, a cosmetic composition and a feed composition comprising the compound of the formula (1) and an acceptable salt thereof. ≪ Formula 1 > At this time, R 1, R 2 and R 3 are each selected from the group consisting of H, alkyl, hydroxy and alkoxy. |