Salt Enhancing Compounds and Use

A flavouring compound or salt enhancer compound according to the formula (I), or a salt thereof,

• wherein:
• R1 is a residue selected from the group of H, an aminoacid linked via a peptide bond selected from the group consisting of γ-Glu, α-Glu, β-Asp, α-Asp, β-Ala, α-Ala, α-Val, α-Leu, α-Ile, α-Met, α-Pro, α-Phe, α-Trp, α-Ser, α-Thr, α-Asn, α-Gln, α-Tyr, α-Cys, α-Lys, α-Arg, α-His, α-Asp, α-Glu, gamma amino butyric acid (GABA), and an uncommon amino acid including 4-hydroxyprolin, ε-N,N,N-trimethyllysine, 3-methylhistindine, 5-hydroxylysine, O-phosphoserine, gamma-carboxyglutamate, ε-N-acetyllysine, ω-N-methylarginine, N-acetylserine, N,N,N-trimethylalanine, N-formylmethionine;
• R2 is a residue selected from the group consisting of OH, a C1-C5 linear or branched alkoxy residue including —O—CH3, —O—CH2—CH3, —O—CH2CH2CH3, —O—CH(CH3)CH3, —O—CH2CH(CH3)2, —O—CH2CH(CH3)(CH2CH3), and —O—CH2CH2CH(CH3)2, and an aminoacid linked via a peptide bond selected from the group consisting of Gly, β-Ala, α-Ala, α-Val, α-Leu, α-Ile, α-Met, α-Pro, α-Phe, α-Trp, α-Ser, α-Thr, α-Asn, α-Gln, α-Tyr, α-Cys, α-Lys, α-Arg, α-His, α-Asp, α-Glu, gamma amino butyric acid (GABA), and an uncommon amino acid including 4-hydroxyprolin, ε-N,N,N-trimethyllysine, 3-methylhistindine, 5-hydroxylysine, O-phosphoserine, gamma-carboxyglutamate, ε-N-acetyllysine, ω-N-methylarginine, N-acetylserine, N,N,N-trimethylalanine, N-formylmethionine;
• R3 is a residue selected from —CH2— or —CH2CH2.—;
• X is a residue selected from —S— or —O—;
• and
• Y is a residue selected from the group comprising —CH2—, —CH2CH2—, CH2CH2CH2—, —CH(COOH)—, —C(COOH)2—, —C(CH2COOH)2—, —C(CH2COOH)(COOH)—, —C(CH(COOH)2)(COOH)—, —CH(CH2COOH)—, —CH(CH2CH2COOH)—, —CH(CH2CH2CH2COOH)—, —CH(CH(COOH)2)—, —CH(CH(COOH)CH(COOH)2)—, —CH(CH2CH(COOH)2)—, —CH(CH(COOH)CH2COOH)—, —CH2—CH(COOH)—, —CH2—C(COOH)2—, —CH2—C(CH2COOH)2—, —CH2—C(CH2COOH)(COOH)—, —CH2—C(CH(COOH)2)(COOH)—, —CH2—CH(CH2COOH)—, —CH2—CH(CH2CH2COOH)—, —CH2—CH(CH2CH2CH2COOH)—, —CH2—CH(CH(COOH)2)—, —CH2—CH(CH(COOH)CH(COOH)2)—, —CH2—CH(CH2CH(COOH)2)—, —CH2—CH(CH(COOH)CH2COOH)—, —CH(COOH)—CH2—, —C(COOH)2—CH2—, —C(CH2COOH)2—CH2—, —C(CH2COOH)(COOH)—CH2—, —C(CH(COOH)2)(COOH)—CH2—, —CH(CH2COOH)—CH2—, —CH(CH2CH2COOH)—CH2—, —CH(CH2CH2CH2COOH)—CH2—, —CH(CH(COOH)2)—CH2—, —CH(CH(COOH)CH(COOH)2)—CH2—, —CH(CH2CH(COOH)2)—CH2—, and —CH(CH(COOH)CH2COOH)—CH2—.