Your Query returns 7 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
P2ry4NM_02062110090P2Y4R    300038
P2ry4NW_04804310116
P2RY4NM_0025659606NRU    P2P    UNR    P2Y4    300038
P2ry4NT_07887710090300038
P2RY4AF31344710047
P2RY4NT_0116699606300038
P2ry4NM_03168010116P2Y4   

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

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Text2Knowledge ... Yong Huang 2002