By Luc Cohen NEW YORK (Reuters) -An alleged Russian intelligence agent was charged with violating U.S. sanctions and money laundering by purchasing two condominiums in Beverly Hills, California, and concealing his involvement, federal prosecutors in Brooklyn said on Wednesday. Andrii Derkach, who is at large, was sanctioned by the U.S. Treasury Department in September 2020 for being an active Russian agent for over a decade and for assisting the Kremlin’s efforts to interfere in the 2020 U.S. election. The indictment unsealed on Wednesday said that since 2013 Derkach has used overseas accounts…