乙型强心苷元甾体母核上C17位上的取代基是

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SQL Error: select id,body,options from ***_enewstiku where sourceid='29772' and id < 2417637 and id<>'2417637' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='29772' and id > 2417637 and id<>'2417637' order by id asc limit 5