. . . "114998826"^^ . "propylene"@en-us . . "14998826-n"^^ . . "a flammable gas obtained by cracking petroleum; used in organic synthesis"@en-us . "propylene"^^ . "114147373"@en-us . . "110764670"@en-us . . "0"^^ . "0"^^ . "propene"@en-us . . . . .