Your Query returns 8 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
CYP18NC_004354722718a1    P450    P-450    181H6T    CG6816    CytP450    Eig17-1    Cyp18a1   
CYP18NM_078679722718a1    P450    P-450    181H6T    CG6816    CytP450    Eig17-1    Cyp18a1   
CYP18NM_167628722718a1    P450    P-450    181H6T    CG6816    CytP450    Eig17-1    Cyp18a1   
CYP18U447537227
cyp18AP005036227882
CYP18Y0827349450
cyp18AY3438901890
cyp18NC_003155227882

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

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Text2Knowledge ... Yong Huang 2002