Amino acid compounds and photoprotecting compositions comprised thereof

A photoprotective cosmetic composition suited for the UV-photoprotection of human skin and/or hair, comprising an effective UV-photoprotective amount of at least one amino acid compound having the structural formula (I):

• in which n is an integer ranging from 1 to 4;
• and R1 is one of the following radicals of formula (1), (2), (3), (4), (5), (6) or (7):
• in which p is an integer ranging from 1 to 3;
• R2 is a hydrogen atom, a C1-C8 alkyl radical, a C1-C8 O-alkyl radical, or a C1-C8 O-acyl radical;
• R3 and R4, which may be identical or different, are each a hydrogen or halogen atom, or C1-C8 alkyl or alkoxy, or a radical of the following formula (8):
• R5 is a hydrogen or halogen atom, a C1-C8 alkyl or alkoxy radical, or a divalent radical:
• R6 is a hydrogen atom, a C1-C8 alkyl radical, or a divalent radical:
• with the proviso that at least one of the two substituents R5 and R6 is the divalent radical:
• R7 is a C1-C8 alkyl radical;
• or an acid or base salt thereof, formulated into a topically applicable, cosmetically acceptable vehicle, diluent or carrier therefor.