[ensembl-dev] RefSeq <-> Ensembl Transcript ID?

[Cei Abreu-Goodger]

Hello,

Is it possible to obtain the relationship between Ensembl Transcript IDs 
and NCBI's RefSeq transcript ids (NM_########)? I've been searching in 
the DBEntries assigned to the transcripts, but can't seem to find this.

Thanks!

Cei