Exhibit 2.3 RESCISSION OF STOCK EXCHANGE AGREEMENT Agreement made and entered in multiple parts on this 31st day of May, 2005 by and between Neuro Bioscience, Inc. of Utah, (hereinafter "Neuro Bioscience of Utah"), CLL Pharma SA (hereinafter "CLL...Rescission of Stock Exchange Agreement • August 10th, 2005 • Neuro Bioscience Inc • Loan brokers
