Your Query returns 4 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Acas1NM_01981110090ACAS    AceCS1    1110017C11Rik    Acas2   
Acas1NM_00798110090Acs    Acas    FACS    Facl2    Acsl1   
Acas1BC05664410090FACS    Acas    Acs    Acsl1   
ACAS1U868653625

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

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Text2Knowledge ... Yong Huang 2002