Fred Ohebshalom is under pressure in Midtown from a Minnesota-based debt buyer. Stillwater Asset Management is looking to foreclose on Ohebshalom’s nine-story office building at 226 East 54th Street after purchasing the building’s debt in March. The property, between Second and Third avenues in Midtown East, provided office space to Sky Management, the Ohebshalom family’s property management firm. Sky Management principals Jonathan and Ben Ohebshalom are defendants in the foreclosure action, which Stillwater brought before