Your Query returns 3 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
snRNA:U2:14BNR_0013157227
snRNA:U2:14BNC_0043547227K6    U2    dU2    U2-14B    CR32913    U2snRNA    snRNA:U2    U2snRNA14B   
snRNA:U2:14BNR_0021307227K6    U2    dU2    U2-14B    CR32913    U2snRNA    snRNA:U2    U2snRNA14B   

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

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Text2Knowledge ... Yong Huang 2002