A very common reference for this number is the polyclonal antibody #NB100-56576 (Novus Biologicals), used in studies to detect the SARS-CoV-2 Nucleocapsid Protein. Guides or supplementary data files in research papers, such as those on PMC (PubMed Central) , often use these catalog numbers to identify experimental protocols.
F56576-01 is the document ID for the Oracle Healthcare Foundation Licensing Information User Manual . 56576.rar
It is associated with the ISBN suffix for Miocene and Oligocene Petroleum Reservoirs (ISBN 978156576). A very common reference for this number is