[BioC] Human, Mouse and Rat homologs

[David Lyon]

If I had a file containing a list of Human:

1)Refseq IDs:

"probe_id" "accession"
"1" "8039748" "NM_130786"
"2" "8039748" "NP_570602"
"3" "7960947" "NM_000014"
"4" "7960947" "NP_000005"
"5" "8144857" "NM_000662"
"6" "8144857" "NM_001160170"

Or 

2)Ensemble genes:

"probe_id" "ensembl_id"
"1" "8039748" "ENSG00000121410"
"2" "7960947" "ENSG00000175899"
"3" "8144857" "ENSG00000171428"
"4" "8144866" "ENSG00000156006"
"5" "7976496" "ENSG00000196136"
"6" "8083415" "ENSG00000114771"


which R package does the conversion of the list of IDs to find the Mouse homologs and can someone type the exact command?

Thank you for your consideration.