Large, sunny, sophisticated apartment. . . Recently converted to an open one-bedroom layout.  This flexible space can easily revert to its original design with two bedrooms and two and a half bathrooms.  Features include a spacious living room, and a Siematic granite kitchen with a Sub-Zero refrigerator and many creative cabinets.  A bay-windowed dining area faces the crme-de-la-crme of Madison Avenue.  Master suite features a walk-in closet, an en-suite bathroom, plus multiple built-in storage areas.  A unique feature is a large dressing room with two walk-in closets and a second new bathroom.  An added bonus is a large den which easily accommodates two desks.  Another convenient feature is a Murphy bed built into the living room wall and hidden by a large framed painting.This full-service building includes a gym and boasts an experienced staff and live-in building manager.  Pets and Pieds-a-terre permitted.  Incredible Upper East Side location across from the Whitney, one block from Central Park, and surrounded by fabulous dining and shopping.  Incredibly low maintenance includes a parking space with valet service in the buildings private garage, a gym, a private storage unit, electricity, and cable television.