It kills me they don't give the name. I tried recreating it on ChemDoodle but it wants me to pay $20 to figure out the IUPAC name. Bullshit. I know the end is a group formed by bonding to Nitrous acid and the rest of it, I can't figure out. Bah. Sorry my knowledge is so limited. I do know that Aqua Regia is a combinatious of Nitric and Hydrochloric acids, so this concept is not too farfetched. If it means I can separate gold from Silicon, I'm all for it.