4H-1-Benzopyran-4-one, 7-((6-deoxy-3-O-(6-deoxy-alpha-L-mannopyranosyl)-alpha-L-mannopyranosyl)oxy)-3-((6-O-beta-D-galactopyranosyl-beta-D-glucopyranosyl)oxy)-5-hydroxy-2-(4-hydroxyphenyl)- 81944-31-2 Brucella melitensis M antigen M Antigen (brucella melitensis) Melitin Melitine