合成血红素的基本原料有（ ）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='30919' and id < 2488304 and id<>'2488304' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30919' and id > 2488304 and id<>'2488304' order by id asc limit 5