Once you are there, choose "Ensembl Genes 93" as the database, then choose "Human Genes" as the dataset (assuming this is human).
Then go over to filters on the left side and expand the Gene section. Check the box that says "Input external references ID list" and select from the dropdown menu "PDB ID(s)". This is where you input your list of PDB IDs
Now go back to the left side and click Attributes. Expand the Gene section and select "Gene name".
Finally on the top left choose Results and you can choose how to output this table.