Your Query returns 18 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
cntn1NM_1809697955F3   
Cntn1NM_00772710090CNTN    F3cam    600016
CNTN1U078199606600016
CNTN1U078209606600016
Cntn1NW_04778310116
CNTN1BC0365699606F3    GP135    600016
CNTN1AY4176789606600016
CNTN1AY4176799598
CNTN1AY41768010090600016
CNTN1NM_0018439606F3    GP135    600016
CNTN1NM_1750389606F3    GP135    600016
CNTN1NM_1742809913
Cntn1NT_03962110090600016
Cntn1AF32570610090600016
Cntn1AF32520010090600016
Cntn1BC06686410090CNTN    600016
CNTN1NT_0294199606600016
Cntn1NM_05711810116F3   

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

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Text2Knowledge ... Yong Huang 2002