def find_file_name(zipfile):
    """
    Finds file from the zip archive ending with issn-to-issn-l.txt.
    """
    files = zipfile.namelist()
    select_file = [f for f in files if f.lower().endswith("issn-to-issn-l.txt")]
    file = select_file[0] if select_file else None
    return file