. . . "0"^^ . "purine"@en-us . . "purine"^^ . "a colorless crystalline organic base containing nitrogen; the parent compound of various biologically important substances"@en-us . "14706574-n"^^ . . . . "0"^^ . "114706574"^^ . "113866210"@en-us . . . . . "110542821"@en-us . .