Chemical, pharmaceutical, biopharmaceutical and biomedical agents for medical use, namely, immune response modulating agents; chemical agents for pharmaceutical or medical purposes, namely, immune response modulating agents; pharmaceutical agents for encapsulating transplanted cells to prevent the risk of rejection from immune attack, for medical purposes; pharmaceutical preparations for the prevention and treatment of fibrosis, inflammation, cancer or infection; drug delivery agents in the form of coatings for capsules that facilitate the tolerance and delivery of pharmaceutical preparations.