has part has_part has part has functional parent peptide antibiotic amino sulfonic acid colistin polymyxin colistimethate 1623.604 1639.90900 A mixture where R = H or Me. Colistin in which each of the primary amino groups is converted to the corresponding aminomethanesulfonic acid. It is prepared from colistin by the action of formaldehyde followed by sodium bisulfite. A polymyxin antibiotic, it is used as its penta-sodium salt in the treatment of severe infections, particularly of multidrug-resistant Gram-negative bacteria such as Pseudomonas aeruginosa and Acinetobacter baumannii. C57H107N16O28S5R CC[C@@H](C)CCCCC(=O)N[C@@H](CCNCS(O)(=O)=O)C(=O)N[C@@H]([C@@H](C)O)C(=O)N[C@@H](CCNCS(O)(=O)=O)C(=O)N[C@H]1CCNC(=O)[C@@H](NC(=O)[C@H](CCNCS(O)(=O)=O)NC(=O)[C@H](CCNCS(O)(=O)=O)NC(=O)[C@H](CC(C)C)NC(=O)[C@@H](CC(C)C)NC(=O)[C@H](CCNCS(O)(=O)=O)NC1=O)[C@@H](C)O CHEBI:59662 DrugBank:DB01111 PMID:16931410 chebi_ontology colistimethate A colistimethate B