每个核苷酸单体由3部分组成，下面()不是组成核苷酸的基本基团。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='29807' and id < 2419192 and id<>'2419192' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='29807' and id > 2419192 and id<>'2419192' order by id asc limit 5