le php transforme de simple guillemé en double cotes

 $reponse = mysql_query("SELECT DISTINCT M.trivial_name,M.iupac_code, M.origin, T.label_type FROM molecule M, monosacch_family F,sugar_identifier SF,type T WHERE M.id_type=T.id_type AND M.id_molecule=SF.id_molecule AND SF.id_family=F.id_family ".$requete." ORDER BY M.trivial_name");
            if(mysql_num_rows($reponse)==0)echo "<p style='text-align:center'><b>No Oligosaccharide</b></p>";
            else echo"<table border='1'><tr><th>Trivial name</th><th>IUPAC code</th><th>Origin</th><th>Type</th><th>Selection</th></tr>";
                while($donnees= mysql_fetch_array($reponse)or die(mysql_error()))
                {
                    
                    echo "<tr ><td style='text-align:left;padding-left:10px;'>".$donnees['trivial_name']."</td><td style='text-align:left;padding-left:10px;'>".$donnees['iupac_code']."</td><td>".$donnees['origin']."</td><td>".$donnees['label_type']."</td>";
                    if(in_array($donnees['trivial_name'],$liste)){
                        echo "<td><input type='button' value='added' disabled='disabled' id=\"boutton_add_".$donnees['trivial_name']."\" onclick=\"javascript:ajouterOligosaccharide(\"".$donnees['trivial_name']."\")\"></td></tr>"; 
                    }
                    else{
                        echo "<td><input type='button' value='add' id=\"boutton_add_".$donnees['trivial_name']."\"  onclick='javascript:ajouterOligosaccharide(\"".$donnees['trivial_name']."\")'></td></tr>"; 
                    }

            }