Use of a flavor composition in a feline pet food product, wherein the flavor composition comprises a compound of Formula Nt-1 comprising the structure wherein R 1 is selected from the group consisting of wherein R 2 is selected from monophosphate, diphosphate, triphosphate, -OP(W)(OH) 2 , -OP(W)(OH)OP(W)(OH) 2 , -OP(W)(OH)OP(W)(OH)OP(W)(OH) 2 , -OS(O) 2 aryl(H), -OS(O) 2 aryl(CH 3 ), -P(W)(OH) 2 , -OP(W)(OH)OS(O) 2 (OH), - OP(W)(OH)Z, -P(W)(OH)OP(W)(OH) 2 , -O(CH 2 ) 1-4 OP(W)(OH) 2 , -OS(W)(OH) 2 , -OP(W)(OH)CH 2 OP(W)(OH) 2 , -OP(W)(OH)OP(W)O(CH 2 ) 1-4 R 18 , -(CH 2 ) 0-4 COOH, -(CH 2 ) 0-4 S(O)(OH) 2 , -(CH 2 ) 0-4 C(O)NHOH and -(CH 2 ) 0-4 B(OH) 2 ; wherein X is selected from O, S, N(R 3 ) and CH 2 ; wherein W is selected from O and S; wherein R 3 is selected from H and CH 3 ; wherein R 4 , R 5 , R 14 , R 15 , R 18 are independently selected from H, OH, SH, CH 2 , CH 3 , OR 6 , SR 6 , CH 2 CH 3 , lower alkyl branched and unbranched (C 1 -C 6 ), XC(O)lower alkyl, -XC(O)CH 2 Ph, -P(W)(OH) 2 , - XC(O)PhR 11 , -OP(O)(OH)O, OCH 3 , N(R 11 , R 17 ), - O(C)nR 11 , R 17 O-, N(H or independently lower alkyl) 2-3 , COOR 11 , -OC(W)NH(CH 2 ) 1 - 6 NH 2 , -OC(W)NH(CH 2 ) 1-6 R 4 ; wherein Z is selected from piperidine, morpholine, piperazine, N-methylpiperazine, N(R 16 )(R 17 ); wherein R 6 , R 11 , R 16 and R 17 are selected independently from H, OH, SH, CH 2 , CH 3 , OCH 3 , COOR, N(R 12 )(R 13 ), CH 2 CH 3 , lower alkyl branched and unbranched (C 1 -C 6 ), XC(O)lower alkyl, -XC(O)CH 2 Ph, -P(W)(OH) 2 , - XC(O)PhR 12 , -OP(O)(OH)O, OCH 3 , N(R 12 , R 13 ), -O(C)nR 12 , R 13 O-, N(H or independently lower alkyl) 2-3 and COOR 12 ; and wherein R 12 and R 13 are selected independently from H, OH, SH, CH 2 , CH 3 , OCH 3 and CH 2 CH 3 . wherein R 1 is selected from the group consisting of wherein R 2 is selected from monophosphate, diphosphate, triphosphate, -OP(W)(OH) 2 , -OP(W)(OH)OP(W)(OH) 2 , -OP(W)(OH)OP(W)(OH)OP(W)(OH) 2 , -OS(O) 2 aryl(H), -OS(O) 2 aryl(CH 3 ), -P(W)(OH) 2 , -OP(W)(OH)OS(O) 2 (OH), - OP(W)(OH)Z, -P(W)(OH)OP(W)(OH) 2 , -O(CH 2 ) 1-4 OP(W)(OH) 2 , -OS(W)(OH) 2 , -OP(W)(OH)CH 2 OP(W)(OH) 2 , -OP(W)(OH)OP(W)O(CH 2 ) 1-4 R 18 , -(CH 2 ) 0-4 COOH, -(CH 2 ) 0-4 S(O)(OH) 2 , -(CH 2 ) 0-4 C(O)NHOH and -(CH 2 ) 0-4 B(OH) 2 ; wherein X is selected from O, S, N(R 3 ) and CH 2 ; wherein W is selected from O and S; wherein R 3 is selected from H and CH 3 ; wherein R 4 , R 5 , R 14 , R 15 , R 18 are independently selected from H, OH, SH, CH 2 , CH 3 , OR 6 , SR 6 , CH 2 CH 3 , lower alkyl branched and unbranched (C 1 -C 6 ), XC(O)lower alkyl, -XC(O)CH 2 Ph, -P(W)(OH) 2 , - XC(O)PhR 11 , -OP(O)(OH)O, OCH 3 , N(R 11 , R 17 ), - O(C)nR 11 , R 17 O-, N(H or independently lower alkyl) 2-3 , COOR 11 , -OC(W)NH(CH 2 ) 1 - 6 NH 2 , -OC(W)NH(CH 2 ) 1-6 R 4 ; wherein Z is selected from piperidine, morpholine, piperazine, N-methylpiperazine, N(R 16 )(R 17 ); wherein R 6 , R 11 , R 16 and R 17 are selected independently from H, OH, SH, CH 2 , CH 3 , OCH 3 , COOR, N(R 12 )(R 13 ), CH 2 CH 3 , lower alkyl branched and unbranched (C 1 -C 6 ), XC(O)lower alkyl, -XC(O)CH 2 Ph, -P(W)(OH) 2 , - XC(O)PhR 12 , -OP(O)(OH)O, OCH 3 , N(R 12 , R 13 ), -O(C)nR 12 , R 13 O-, N(H or independently lower alkyl) 2-3 and COOR 12 ; and wherein R 12 and R 13 are selected independently from H, OH, SH, CH 2 , CH 3 , OCH 3 and CH 2 CH 3 . <EOS>