吗啡结构中的手性碳原子个数是

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SQL Error: select id,body,options from ***_enewstiku where sourceid='29782' and id < 2418258 and id<>'2418258' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='29782' and id > 2418258 and id<>'2418258' order by id asc limit 5