Compounds of general formula (I) : €ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒR 1 -W n -X m -AA 1 -AA 2 -AA 3 -AA 4 -AA 5 -AA 6 -AA 7 -AA 8 -AA 9 -Y p -Z q -R 2 €ƒ€ƒ€ƒ€ƒ€ƒ(I) their stereoisomers, mixtures thereof and/or their cosmetically or pharmaceutically acceptable salts, preparation processes, cosmetic or pharmaceutical compositions which contain them and their use in medicine, particularly in the treatment and/or prevention of pain, inflammation, itching, neurological, compulsive and/or neuropsychiatric diseases and/or disorders and in processes of treatment and/or care of the skin, hair and/or mucous membranes mediated by neuronal exocytosis.