<?xml version="1.0" ?><rxclassdata><drugMemberGroup><drugMember><minConcept><rxcui>103</rxcui><name>mercaptopurine</name><tty>IN</tty></minConcept><nodeAttr><attrName>SourceId</attrName><attrValue>103</attrValue></nodeAttr><nodeAttr><attrName>SourceName</attrName><attrValue>mercaptopurine</attrValue></nodeAttr><nodeAttr><attrName>Relation</attrName><attrValue>INDIRECT</attrValue></nodeAttr></drugMember><drugMember><minConcept><rxcui>10991</rxcui><name>unithiol</name><tty>IN</tty></minConcept><nodeAttr><attrName>SourceId</attrName><attrValue>10991</attrValue></nodeAttr><nodeAttr><attrName>SourceName</attrName><attrValue>unithiol</attrValue></nodeAttr><nodeAttr><attrName>Relation</attrName><attrValue>INDIRECT</attrValue></nodeAttr></drugMember><drugMember><minConcept><rxcui>114918</rxcui><name>technetium Tc 99m bicisate</name><tty>PIN</tty></minConcept><nodeAttr><attrName>SourceId</attrName><attrValue>114918</attrValue></nodeAttr><nodeAttr><attrName>SourceName</attrName><attrValue>technetium Tc 99m bicisate</attrValue></nodeAttr><nodeAttr><attrName>Relation</attrName><attrValue>INDIRECT</attrValue></nodeAttr></drugMember><drugMember><minConcept><rxcui>1314350</rxcui><name>ergothioneine</name><tty>IN</tty></minConcept><nodeAttr><attrName>SourceId</attrName><attrValue>1314350</attrValue></nodeAttr><nodeAttr><attrName>SourceName</attrName><attrValue>ergothioneine</attrValue></nodeAttr><nodeAttr><attrName>Relation</attrName><attrValue>INDIRECT</attrValue></nodeAttr></drugMember><drugMember><minConcept><rxcui>1314352</rxcui><name>ethanethiol</name><tty>IN</tty></minConcept><nodeAttr><attrName>SourceId</attrName><attrValue>1314352</attrValue></nodeAttr><nodeAttr><attrName>SourceName</attrName><attrValue>ethanethiol</attrValue></nodeAttr><nodeAttr><attrName>Relation</attrName><attrValue>DIRECT</attrValue></nodeAttr></drugMember><drugMember><minConcept><rxcui>1364940</rxcui><name>sodium thioglycolate</name><tty>PIN</tty></minConcept><nodeAttr><attrName>SourceId</attrName><attrValue>1364940</attrValue></nodeAttr><nodeAttr><attrName>SourceName</attrName><attrValue>sodium thioglycolate</attrValue></nodeAttr><nodeAttr><attrName>Relation</attrName><attrValue>INDIRECT</attrValue></nodeAttr></drugMember><drugMember><minConcept><rxcui>1426886</rxcui><name>cysteamine hydrochloride</name><tty>PIN</tty></minConcept><nodeAttr><attrName>SourceId</attrName><attrValue>1426886</attrValue></nodeAttr><nodeAttr><attrName>SourceName</attrName><attrValue>cysteamine hydrochloride</attrValue></nodeAttr><nodeAttr><attrName>Relation</attrName><attrValue>INDIRECT</attrValue></nodeAttr></drugMember><drugMember><minConcept><rxcui>1482632</rxcui><name>ammonium thioglycolate</name><tty>PIN</tty></minConcept><nodeAttr><attrName>SourceId</attrName><attrValue>1482632</attrValue></nodeAttr><nodeAttr><attrName>SourceName</attrName><attrValue>ammonium thioglycolate</attrValue></nodeAttr><nodeAttr><attrName>Relation</attrName><attrValue>INDIRECT</attrValue></nodeAttr></drugMember><drugMember><minConcept><rxcui>1546352</rxcui><name>2,3-dimercapto-1-propanesulfonic acid</name><tty>IN</tty></minConcept><nodeAttr><attrName>SourceId</attrName><attrValue>1546352</attrValue></nodeAttr><nodeAttr><attrName>SourceName</attrName><attrValue>2,3-dimercapto-1-propanesulfonic acid</attrValue></nodeAttr><nodeAttr><attrName>Relation</attrName><attrValue>INDIRECT</attrValue></nodeAttr></drugMember><drugMember><minConcept><rxcui>1546354</rxcui><name>2-mercaptoethanesulfonic acid</name><tty>IN</tty></minConcept><nodeAttr><attrName>SourceId</attrName><attrValue>1546354</attrValue></nodeAttr><nodeAttr><attrName>SourceName</attrName><attrValue>2-mercaptoethanesulfonic acid</attrValue></nodeAttr><nodeAttr><attrName>Relation</attrName><attrValue>INDIRECT</attrValue></nodeAttr></drugMember><drugMember><minConcept><rxcui>1731031</rxcui><name>lesinurad</name><tty>IN</tty></minConcept><nodeAttr><attrName>SourceId</attrName><attrValue>1731031</attrValue></nodeAttr><nodeAttr><attrName>SourceName</attrName><attrValue>lesinurad</attrValue></nodeAttr><nodeAttr><attrName>Relation</attrName><attrValue>INDIRECT</attrValue></nodeAttr></drugMember><drugMember><minConcept><rxcui>2198944</rxcui><name>lefamulin</name><tty>IN</tty></minConcept><nodeAttr><attrName>SourceId</attrName><attrValue>2198944</attrValue></nodeAttr><nodeAttr><attrName>SourceName</attrName><attrValue>lefamulin</attrValue></nodeAttr><nodeAttr><attrName>Relation</attrName><attrValue>INDIRECT</attrValue></nodeAttr></drugMember><drugMember><minConcept><rxcui>221086</rxcui><name>cysteine hydrochloride</name><tty>PIN</tty></minConcept><nodeAttr><attrName>SourceId</attrName><attrValue>221086</attrValue></nodeAttr><nodeAttr><attrName>SourceName</attrName><attrValue>cysteine hydrochloride</attrValue></nodeAttr><nodeAttr><attrName>Relation</attrName><attrValue>INDIRECT</attrValue></nodeAttr></drugMember><drugMember><minConcept><rxcui>2281674</rxcui><name>1,2-propanedithiol</name><tty>IN</tty></minConcept><nodeAttr><attrName>SourceId</attrName><attrValue>2281674</attrValue></nodeAttr><nodeAttr><attrName>SourceName</attrName><attrValue>1,2-propanedithiol</attrValue></nodeAttr><nodeAttr><attrName>Relation</attrName><attrValue>DIRECT</attrValue></nodeAttr></drugMember><drugMember><minConcept><rxcui>235828</rxcui><name>mecysteine hydrochloride</name><tty>PIN</tty></minConcept><nodeAttr><attrName>SourceId</attrName><attrValue>235828</attrValue></nodeAttr><nodeAttr><attrName>SourceName</attrName><attrValue>mecysteine hydrochloride</attrValue></nodeAttr><nodeAttr><attrName>Relation</attrName><attrValue>INDIRECT</attrValue></nodeAttr></drugMember><drugMember><minConcept><rxcui>236634</rxcui><name>ethyl cysteine hydrochloride</name><tty>PIN</tty></minConcept><nodeAttr><attrName>SourceId</attrName><attrValue>236634</attrValue></nodeAttr><nodeAttr><attrName>SourceName</attrName><attrValue>ethyl cysteine hydrochloride</attrValue></nodeAttr><nodeAttr><attrName>Relation</attrName><attrValue>INDIRECT</attrValue></nodeAttr></drugMember><drugMember><minConcept><rxcui>24305</rxcui><name>erdosteine</name><tty>IN</tty></minConcept><nodeAttr><attrName>SourceId</attrName><attrValue>24305</attrValue></nodeAttr><nodeAttr><attrName>SourceName</attrName><attrValue>erdosteine</attrValue></nodeAttr><nodeAttr><attrName>Relation</attrName><attrValue>INDIRECT</attrValue></nodeAttr></drugMember><drugMember><minConcept><rxcui>24513</rxcui><name>ethyl cysteine</name><tty>IN</tty></minConcept><nodeAttr><attrName>SourceId</attrName><attrValue>24513</attrValue></nodeAttr><nodeAttr><attrName>SourceName</attrName><attrValue>ethyl cysteine</attrValue></nodeAttr><nodeAttr><attrName>Relation</attrName><attrValue>INDIRECT</attrValue></nodeAttr></drugMember><drugMember><minConcept><rxcui>2475951</rxcui><name>dimercaptosuccinic acid</name><tty>IN</tty></minConcept><nodeAttr><attrName>SourceId</attrName><attrValue>2475951</attrValue></nodeAttr><nodeAttr><attrName>SourceName</attrName><attrValue>dimercaptosuccinic acid</attrValue></nodeAttr><nodeAttr><attrName>Relation</attrName><attrValue>INDIRECT</attrValue></nodeAttr></drugMember><drugMember><minConcept><rxcui>29426</rxcui><name>mecysteine</name><tty>IN</tty></minConcept><nodeAttr><attrName>SourceId</attrName><attrValue>29426</attrValue></nodeAttr><nodeAttr><attrName>SourceName</attrName><attrValue>mecysteine</attrValue></nodeAttr><nodeAttr><attrName>Relation</attrName><attrValue>INDIRECT</attrValue></nodeAttr></drugMember><drugMember><minConcept><rxcui>3022</rxcui><name>cysteamine</name><tty>IN</tty></minConcept><nodeAttr><attrName>SourceId</attrName><attrValue>3022</attrValue></nodeAttr><nodeAttr><attrName>SourceName</attrName><attrValue>cysteamine</attrValue></nodeAttr><nodeAttr><attrName>Relation</attrName><attrValue>INDIRECT</attrValue></nodeAttr></drugMember><drugMember><minConcept><rxcui>3024</rxcui><name>cysteine</name><tty>IN</tty></minConcept><nodeAttr><attrName>SourceId</attrName><attrValue>3024</attrValue></nodeAttr><nodeAttr><attrName>SourceName</attrName><attrValue>cysteine</attrValue></nodeAttr><nodeAttr><attrName>Relation</attrName><attrValue>INDIRECT</attrValue></nodeAttr></drugMember><drugMember><minConcept><rxcui>322165</rxcui><name>thiosalicylic acid</name><tty>IN</tty></minConcept><nodeAttr><attrName>SourceId</attrName><attrValue>322165</attrValue></nodeAttr><nodeAttr><attrName>SourceName</attrName><attrValue>thiosalicylic acid</attrValue></nodeAttr><nodeAttr><attrName>Relation</attrName><attrValue>DIRECT</attrValue></nodeAttr></drugMember><drugMember><minConcept><rxcui>32863</rxcui><name>pantethine</name><tty>IN</tty></minConcept><nodeAttr><attrName>SourceId</attrName><attrValue>32863</attrValue></nodeAttr><nodeAttr><attrName>SourceName</attrName><attrValue>pantethine</attrValue></nodeAttr><nodeAttr><attrName>Relation</attrName><attrValue>INDIRECT</attrValue></nodeAttr></drugMember><drugMember><minConcept><rxcui>3445</rxcui><name>dimercaprol</name><tty>IN</tty></minConcept><nodeAttr><attrName>SourceId</attrName><attrValue>3445</attrValue></nodeAttr><nodeAttr><attrName>SourceName</attrName><attrValue>dimercaprol</attrValue></nodeAttr><nodeAttr><attrName>Relation</attrName><attrValue>INDIRECT</attrValue></nodeAttr></drugMember><drugMember><minConcept><rxcui>3446</rxcui><name>succimer</name><tty>IN</tty></minConcept><nodeAttr><attrName>SourceId</attrName><attrValue>3446</attrValue></nodeAttr><nodeAttr><attrName>SourceName</attrName><attrValue>succimer</attrValue></nodeAttr><nodeAttr><attrName>Relation</attrName><attrValue>INDIRECT</attrValue></nodeAttr></drugMember><drugMember><minConcept><rxcui>42547</rxcui><name>aurothiomalate</name><tty>IN</tty></minConcept><nodeAttr><attrName>SourceId</attrName><attrValue>42547</attrValue></nodeAttr><nodeAttr><attrName>SourceName</attrName><attrValue>aurothiomalate</attrValue></nodeAttr><nodeAttr><attrName>Relation</attrName><attrValue>INDIRECT</attrValue></nodeAttr></drugMember><drugMember><minConcept><rxcui>44</rxcui><name>mesna</name><tty>IN</tty></minConcept><nodeAttr><attrName>SourceId</attrName><attrValue>44</attrValue></nodeAttr><nodeAttr><attrName>SourceName</attrName><attrValue>mesna</attrValue></nodeAttr><nodeAttr><attrName>Relation</attrName><attrValue>INDIRECT</attrValue></nodeAttr></drugMember><drugMember><minConcept><rxcui>4981</rxcui><name>gold sodium thiomalate</name><tty>PIN</tty></minConcept><nodeAttr><attrName>SourceId</attrName><attrValue>4981</attrValue></nodeAttr><nodeAttr><attrName>SourceName</attrName><attrValue>gold sodium thiomalate</attrValue></nodeAttr><nodeAttr><attrName>Relation</attrName><attrValue>INDIRECT</attrValue></nodeAttr></drugMember><drugMember><minConcept><rxcui>6835</rxcui><name>methimazole</name><tty>IN</tty></minConcept><nodeAttr><attrName>SourceId</attrName><attrValue>6835</attrValue></nodeAttr><nodeAttr><attrName>SourceName</attrName><attrValue>methimazole</attrValue></nodeAttr><nodeAttr><attrName>Relation</attrName><attrValue>INDIRECT</attrValue></nodeAttr></drugMember><drugMember><minConcept><rxcui>81990</rxcui><name>cysteamine bitartrate</name><tty>PIN</tty></minConcept><nodeAttr><attrName>SourceId</attrName><attrValue>81990</attrValue></nodeAttr><nodeAttr><attrName>SourceName</attrName><attrValue>cysteamine bitartrate</attrValue></nodeAttr><nodeAttr><attrName>Relation</attrName><attrValue>INDIRECT</attrValue></nodeAttr></drugMember></drugMemberGroup></rxclassdata>