A method for inducing {HEAD ~ an immune response} against {TAIL ~ at least one antibiotic resistant enterococcal strain} in a vertebrate, said method comprising administering to said vertebrate an immunologically effective amount of an isolated compound selected from the group consisting of: 
A method for inducing { HEAD ~ an immune response } against { TAIL ~ at least one antibiotic resistant enterococcal strain } in a vertebrate , said method comprising administering to said vertebrate an immunologically effective amount of an isolated compound selected from the group consisting of :
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