Your Query returns 11 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Chrm1NM_00769810090M1    M1R    Chrm-1    118510
Chrm1NW_04756310116
CHRM1BC0077409606HM1    M1    118510
CHRM1BC0229849606HM1    M1    118510
CHRM1AF3855879606118510
CHRM1AF4989159606118510
CHRM1NM_0007389606M1    HM1    MGC30125    118510
Chrm1NT_03968710090118510
CHRM1AF07911110047
CHRM1NT_0339039606118510
Chrm1NM_08077310116

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

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Text2Knowledge ... Yong Huang 2002