Source:http://linkedlifedata.com/resource/umls/id/C0030957
MSH: Peptides whose amino and carboxy ends are linked together with a peptide bond forming a circular chain. Some of them are ANTI-INFECTIVE AGENTS. Some of them are biosynthesized non-ribosomally (PEPTIDE BIOSYNTHESIS, NON-RIBOSOMAL).,CSP: any peptide containing a ring structure.