<?xml version="1.0" ?><rxnormdata><propConceptGroup><propConcept><propCategory>ATTRIBUTES</propCategory><propName>GENERAL_CARDINALITY</propName><propValue>SINGLE</propValue></propConcept><propConcept><propCategory>ATTRIBUTES</propCategory><propName>PRESCRIBABLE</propName><propValue>Y</propValue></propConcept><propConcept><propCategory>ATTRIBUTES</propCategory><propName>TTY</propName><propValue>IN</propValue></propConcept><propConcept><propCategory>CODES</propCategory><propName>RxCUI</propName><propValue>2268087</propValue></propConcept><propConcept><propCategory>CODES</propCategory><propName>SNOMEDCT</propName><propValue>103067001</propValue></propConcept><propConcept><propCategory>CODES</propCategory><propName>SPL_SET_ID</propName><propValue>e728eb54-83e3-4318-af97-ee4804f7a7b8</propValue></propConcept><propConcept><propCategory>CODES</propCategory><propName>UNII_CODE</propName><propValue>RR725D715M</propValue></propConcept><propConcept><propCategory>NAMES</propCategory><propName>RXNAV_STR</propName><propValue>retinaldehyde</propValue></propConcept><propConcept><propCategory>NAMES</propCategory><propName>RxNorm Name</propName><propValue>retinaldehyde</propValue></propConcept><propConcept><propCategory>SOURCES</propCategory><propName>Source</propName><propValue>Metathesaurus FDA Structured Product Labels</propValue></propConcept><propConcept><propCategory>SOURCES</propCategory><propName>Source</propName><propValue>National Drug Data File Plus Source Vocabulary</propValue></propConcept><propConcept><propCategory>SOURCES</propCategory><propName>Source</propName><propValue>US Edition of SNOMED_CT</propValue></propConcept></propConceptGroup></rxnormdata>