5D21:
reference: Multivalency effects on Pseudomonas aeruginosa biofilm inhibition and dispersal by glycopeptide dendrimers targeting lectin LecA., Bergmann M, Michaud G, Visini R, Jin X, Gillon E, Stocker A, Imberty A, Darbre T, Reymond JL, Org Biomol Chem. 2015 Sep 29. PMID: 26416170

This OCA Structure page
uses Jmol, developed by the Jmol Development Team (documentation).