Specific eatable taste modifiers

A composition comprising an eatable having at least one taste selected from bitter and metallic, and at least one tastand in a substantially tasteless amount of about 0.0000001 to about 300% by weight, based on the weight of the eatable, which amount is sufficient to reduce said at least one bitter and metallic taste, said tastand being selected from the group consisting of compounds which are substantially tasteless in the amount used and have the structure:

• ##STR97## wherein n may be 0, 1 or 2;
• each Y which may be the same or different is selected from the group consisting of N, O, and S;
• Q is selected from the group consisting of H, trifluoromethyl, halogen, cyano;
• and substituted or unsubstituted alkyl, alkylene, branched alkyl, branched alkylene, aryl, aralkyl, cycloalkyl, acyl, benzoyl, alkoxy, aryloxy, heterocyclic, polycyclic;
• p and q are 1 when Y is O, p and q are independently selected from the group consisting of 1 and 2 when Y is S;
• and p and q are independently selected from the group consisting of 2 and 3 when Y is N;
• each R which may be the same or different when p>1 and each R' which may be the same or different when q<1 is independently selected from the group consisting of H, trifluoroacetyl;
• and substituted or unsubstituted alkyl, dialkyl, aralkyl, aryl, diaryl, acyl, cycloalkyl, benzoyl, alkyloxycarbonyl, aryloxycarbonyl, alkylaminocarbonyl, arylaminocarbonyl, amidines, alkylamidines, arylamidines, a monosaccharide, a disaccharide, a trisaccharide, an oligosaccharide, phosphorylated saccharides, arylacyl, alkylene, heterocyclic, polycyclic;
• and the following three structures F-2:
• ##STR98## wherein Z and Z' are the same or different and are selected from the group consisting of OH, --O.sup.- X.sup.+, OR", NH.sub.2, NHR", N(R").sub.2 ;
• R" is selected from the group consisting of alkyl, branched alkyl, aryl, aralkyl, alkaryl, cycloalkyl, substituted alkyl, substituted cycloalkyl, substituted aryl, substituted aralkyl, substituted alkaryl;
• R"' is selected from the group consisting of alkyl, branched alkyl, aryl, aralkyl, alkaryl, cycloalkyl, substituted alkyl, substituted cycloalkyl, substituted aryl, substituted aralkyl, substituted alkaryl, and an amino acid side chain;
• where CH--CH or CH.sub.2 --CH.sub.2 bonds exist the level of saturation may be increased by removing one or more hydrogen atoms from the carbon atoms participating in the CH--CH or CH.sub.2 --CH.sub.2 bond and X.sup.+ is selected from the group consisting of H.sup.+ or a physiologically acceptable cation;
• and physiologically acceptable salts or all of the foregoing.