Your Query returns 12 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
H4RNM_15308710090H4    BG26    HH4R    AXOR35    GPRv53    GPCR105    Hrh4   
H4RNM_0216249606H4    BG26    HH4R    AXOR35    GPRv53    GPCR105    HRH4   
H4rNM_0796287227CG3379    His4-88CD    His4r   
H4rNM_1695927227CG3379    His4-88CD    His4r   
H4rNM_1695937227CG3379    His4-88CD    His4r   
H4rNT_0337777227CG3379    His4-88CD    His4r   
H4rAJ1325977227
H4rAJ1325987227
H4rX974377227
H4rX974367224
H4rX974387227
H4RAB0449349606

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

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Text2Knowledge ... Yong Huang 2002