URI for MeSH

Hi all,

I am trying to identify a URI for a concept in MeSH; bioportal URI is
http://bioportal.bioontology.org/ontologies/44776?p=terms&conceptid=D058885
But BioPortal gives me this very polite message:

"We're sorry but something has gone wrong. We have been notified of this
error."

I've looked up the same concept in MeSH site -
http://www.nlm.nih.gov/cgi/mesh/2011/MB_cgi?index=26024 - but it does not
seem to be a well-formed URI (not serving RDF data).

Does anyone know of a proper way to build a URI for MeSH terms?

Best,
Helena