Your Query returns 12 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
HDAC8BC0504339606HDACL1    RPD3    300269
HDAC8AF2300979606300269
HDAC8AJ2777249606300269
HDAC8AY4073859606300269
HDAC8AY4073869598
HDAC8AY40738710090300269
HDAC8NM_0184869606RPD3    HDACL1    300269
Hdac8XM_13599910090300269
Hdac8NT_03971110090300269
Hdac8BC06125710090300269
HDAC8NT_0116699606300269
HDAC8AY5564729823

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

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Text2Knowledge ... Yong Huang 2002