<?xml version="1.0" ?><rxnormdata><propConceptGroup><propConcept><propCategory>ATTRIBUTES</propCategory><propName>GENERAL_CARDINALITY</propName><propValue>SINGLE</propValue></propConcept><propConcept><propCategory>ATTRIBUTES</propCategory><propName>TTY</propName><propValue>PIN</propValue></propConcept><propConcept><propCategory>CODES</propCategory><propName>RxCUI</propName><propValue>2275622</propValue></propConcept><propConcept><propCategory>NAMES</propCategory><propName>RXNAV_STR</propName><propValue>magnesium Mg-28</propValue></propConcept><propConcept><propCategory>NAMES</propCategory><propName>RxNorm Name</propName><propValue>magnesium Mg-28</propValue></propConcept></propConceptGroup></rxnormdata>