Your Query returns 9 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
CYP21A2AY4043709606201910
CYP21A2AY4043719598
CYP21A2AY40437210090201910
CYP21A2AL0495479606201910
CYP21A2NM_0005009606CAH1    CPS1    CA21H    CYP21    CYP21B    P450c21B    201910
CYP21A2NM_1746399913
cyp21A2AJ50696831033
CYP21A2NT_0075929606CAH1    CPS1    CA21H    CYP21    CYP21B    P450c21B    201910
CYP21A2NG_0000139606CAH1    CPS1    CA21H    CYP21    CYP21B    P450c21B    201910

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* OMIM link based on symbol match for human and mouse.

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Text2Knowledge ... Yong Huang 2002