Your Query returns 3 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
18a1NC_0043547227P450    CYP18    P-450    181H6T    CG6816    CytP450    Eig17-1    Cyp18a1   
18a1NM_0786797227P450    CYP18    P-450    181H6T    CG6816    CytP450    Eig17-1    Cyp18a1   
18a1NM_1676287227P450    CYP18    P-450    181H6T    CG6816    CytP450    Eig17-1    Cyp18a1   

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

Google

Text2Knowledge ... Yong Huang 2002