The present invention relates to novel compositions X comprising following substances: (1) L-valine； (2) maltol； (3) naringin； (4) maltodextrine MD 14 (5) arabicgum (spraygum)； (6) acetoin； (7) delta dodecalactone； (8) delta decalactone； and (9) massoia lactone； to the use of the compositions X for modifying, masking, reducing and/or suppressing an unpleasant off-taste, aftertaste or lingering sweetness of at least one sweetener, sweetness enhancer or consumable product； and to a process for the preparation of the compositions X. Further, the invention relates to sweetener compositions comprising at least one sweetener and the novel compositions X； to a method of providing sweetener or sweetness enhancer compositions； to methods of modifying, masking, reducing and/or suppressing an unpleasant off-taste, aftertaste or lingering sweetness of at least one sweetener or sweetness enhancer； and to tabletop sweetener compositions comprising the novel compositions X. The invention also relates to consumable product compositions comprising a consumable product and the novel compositions X； to methods of modifying, masking, reducing and/or suppressing an unpleasant off-taste, aftertaste or lingering sweetness of a consumable product composition； and to methods of imparting rich taste to a consumable product.La presente invención se refiere a nuevas composiciones X que comprenden las siguientes sustancias: (1) L-valina； (2) maltol； (3) naringina； (4) maltodextrina MD 14 (5) goma arábiga (goma de atomización)； (6) acetoína； (7) delta dodecalactona； (8) delta decalactona； y (9) massoia lactona； al uso de las composiciones X para modificar, enmascarar, reducir y/o suprimir un sabor anormal, resabio o dulzura persistente desagradables de al menos un edulcorante, intensificador de dulzura o producto consumible； y a un procedimiento para la preparación de las composiciones X； además, la invención se refiere a composiciones edulcorantes que comprenden al menos un edulcorante y las nu
