. . . . "alkene"^^ . "110549278"@en-us . . "0"^^ . . "113872472"@en-us . . "alkene"@en-us . "114713120"^^ . . . . "any unsaturated aliphatic hydrocarbon"@en-us . "0"^^ . . "14713120-n"^^ . "any unsaturated aliphatic hydrocarbon"@en-us . "olefine"@en-us . . "olefin"@en-us .