Your Query returns 8 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Hrh4NM_15308710090H4    H4R    BG26    HH4R    AXOR35    GPRv53    GPCR105    606792
Hrh4NW_04750710116
HRH4AY1367459606606792
HRH4AJ2982929606606792
HRH4NM_0216249606H4    H4R    BG26    HH4R    AXOR35    GPRv53    GPCR105    606792
Hrh4NT_07864510090606792
HRH4NT_0109669606606792
Hrh4NM_13190910116

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

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Text2Knowledge ... Yong Huang 2002