Your Query returns 10 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
hesx1NM_1313497955Anf    danf    zanf   
Hesx1NM_01042010090Rpx    HES-1    601802
HESX1AF0597349606601802
HESX1AY4003989606601802
HESX1AY4003999598
HESX1AY40040010090601802
HESX1NM_0038659606RPX    601802
Hesx1NT_03959810090601802
Hesx1X8004010090601802
HESX1NT_0225179606601802

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

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Text2Knowledge ... Yong Huang 2002