下列分子式表示的物质，具有同分异构体的是

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='21941' and id < 1915805 and id<>'1915805' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='21941' and id > 1915805 and id<>'1915805' order by id asc limit 5