Your Query returns 19 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Nudt1NM_05712010116Mth1   
Nudt1NM_00863710090Mth1    600312
NUDT1BC0513759606MTH1    p18    p21    p22    p26    600312
NUDT1BC0146189606MTH1    600312
NUDT1BC0653679606MTH1    600312
NUDT1AY4072899606600312
NUDT1AY4072909598
NUDT1AY40729110090600312
NUDT1NM_0024529606MTH1    600312
NUDT1NM_1989489606MTH1    600312
NUDT1NM_1989499606MTH1    600312
NUDT1NM_1989509606MTH1    600312
NUDT1NM_1989529606MTH1    600312
NUDT1NM_1989539606MTH1    600312
NUDT1NM_1989549606MTH1    600312
Nudt1NT_03931610090600312
Nudt1BC02194010090600312
NUDT1NT_0078199606600312
NUDT1NT_0795929606600312

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

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Text2Knowledge ... Yong Huang 2002