How do you find the field names within a structure?

I'm not sure if this is the right forum or not, but I'm trying to figure out how to find the field names within a structure. I'm looking at the ADURI structure and I want to know what the field name is of the URI_SCREEN / AD_URISCR data element? It's a URL field that I want to be able to extract using MDMGX but I need the field name to be able to extract it.