1 EXHIBIT 10.21 GREATER CAPITAL AREA ASSOCIATION OF REALTORS(R), INC. SHORT FORM COMMERICAL AND APARTMENT HOUSE REAL ESTATE PURCHASE AGREEMENT Date of Offer: July 27, 1999 THIS PURCHASE AGREEMENT ("Agreement") is made and entered into by and between...Real Estate Purchase Agreement • March 22nd, 2000 • United Therapeutics Corp • Pharmaceutical preparations • District of Columbia
