. . "alkapton"^^ . . . "alkapton"@en-us . "114585048"^^ . "an acid formed as an intermediate product of the metabolism of tyrosine and phenylalanine"@en-us . . . . "0"^^ . . "homogentisic acid"@en-us . "alcapton"@en-us . . . . "an acid formed as an intermediate product of the metabolism of tyrosine and phenylalanine"@en-us . "14585048-n"^^ . "0"^^ . "113749843"@en-us . .