Amino acid derivatives; compositions containing them; use as agents for treating human perspiration

Compound corresponding to formula (I) below, the salts thereof, the optical isomers, stereoisomers, enantiomers and diastereoisomers thereof, or a geometrical isomer thereof:

• in which X denotes a group chosen from:
• with n=1, 2 and m=1, 2, 3, 4,
• with n=1, 2,
• with m=1, 2, 3, 4,
• a denoting the point of attachment of the said radical to the carbonyl group and b denoting the point of attachment of the said radical with the group NH, in formula (I);
• R1 denotes hydrogen, an aryl or benzyl or linear or branched saturated or unsaturated C1-C18 alkyl radical,
• R2 denotes a radical —OR1 or —NR1′R2′;
• R1′ and R2′, which may be identical or different, denote a hydrogen atom or a radical R1;
• R3 denotes —OH or one of the following groups:
• with n=1, 2, 3