Cerecor Inc. (NASDAQ: CERC), a biopharmaceutical company focused on becoming a leader in development and commercialization of treatments for rare and orphan diseases in pediatrics and neurology, announced today that it has submitted to the U.S. Food and Drug Administration (FDA) three Orphan Drug Designation (ODD) Requests for substrate replacement therapies to treat ultra-rare inherited metabolic disorders known as Congenital Disorders of Glycosylation (CDGs).