| abstract |
The following general formula (I): (In the formula, R 1 is a glycosyl group, a phosphate group, or cyclic phosphate groups bound to R 2; R 2 is -CH 2 OH, -CHO, -CH 2 NH 2, -CH 2 - amino acid residues group, or -CH 2 -OPO indicates 2 H; R 3 is a hydrogen atom or a -PO 3 compound represented by with H 2 indicates a) or a salt thereof, and the compound or cosmetic comprising a salt thereof, pharmaceutical, food And / or a composition for feed. |