V 6879 (OTTO) Vancomycin hydrochloride, from Streptomyces orientalis, ≥85% (HPLC) Cas 1404-93-9 - used to block bacterial cell wall biosynthesis at the level of peptidoglycan biosynthesis by inhibiting incorporation of terminal D-alanyl-D-alanine moieties of the NAM/NAG-peptides.