. . . . . . "0"^^ . . "occurs in natural gas; used in the manufacture of rubber and fuels"@en-us . . "0"^^ . . "butane"^^ . "114685017"^^ . . . "110526553"@en-us . . . . . . . "butane"@en-us . "113845196"@en-us . . "14685017-n"^^ . . . . . . .