Your Query returns 6 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Mdh-1NM_00861510090Mod-1    D9Ertd267e    Mod1   
mdh-1AF0021976239
Mdh-1AF0686883847
Mdh-1AF0686893847
mdh-1NC_0032816239F20H11.3    CELK01584   
mdh-1NM_0660566239F20H11.3    CELK01584   

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

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Text2Knowledge ... Yong Huang 2002