Your Query returns 2 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
D-MycNC_0043547227Myc    DMYc    dMyc1    CG10798    l(1)G0139    dm   
D-MycNM_0803237227Myc    DMYc    dMyc1    CG10798    l(1)G0139    dm   

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

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Text2Knowledge ... Yong Huang 2002