"carbamic acid"@en-us . "carbamic acid"^^ . . . "113949388"@en-us . . . "an acid that is known only by virtue of its salts (as ammonium carbamate) or its esters (as urethane)"@en-us . "110609623"@en-us . . . . . "0.25"^^ . "114792389"^^ . "0"^^ . . . "14792389-n"^^ .