Complex sentence: From 2005 to 2007 Curis and Procter & Gamble collaborated on developing a topical hedgehog agonist for hair loss; the agent did not meet safety standards, and the program was terminated.
Split into simpler sentences: From 2005 to 2007 Curis and Procter & Gamble collaborated on developing a topical hedgehog agonist for hair loss. The agent did not meet safety standards, and was terminated.