Nocathiacin I is an antibiotic peptide. It is a fermentation product isolated from Nocardia sp. Nocathiacin I is an antibiotic peptide. It is a fermentation product isolated from Nocardia sp. Synthesis of novel nocathiacin-class antibiotics. Condensation of glycolaldehyde with primary amides and tandem reductive amination of amadori-rearranged 2-oxoethyl intermediates