Your Query returns 3 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
CR32866NR_0013797227snRNA:U1:95Cb   
CR32866NR_0020777227K5    U1    U1-95.2    U1snRNA    U1a-95Cb    snRNA:U1    snRNA:U1:95Cb   
CR32866NT_0337777227K5    U1    U1-95.2    U1snRNA    U1a-95Cb    snRNA:U1    snRNA:U1:95Cb   

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

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Text2Knowledge ... Yong Huang 2002