Your Query returns 5 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
DRD1ANM_0007949606DADR    DRD1   
Drd1aNM_01007610090Drd1    Drd-1    Gpcr15    C030036C15Rik   
Drd1aNW_04748910116
Drd1aNT_03958510090
Drd1aNM_01254610116D1a    Drd1    Drd-1   

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

Google

Text2Knowledge ... Yong Huang 2002