Acknowledgment. Acknowledgment is made to the donors of the Petroleum Research Fund, administered by the American Chemical Society, for partial support of this work. We also acknowledge the support of the American Cancer Society, the National Institutes of Health (Biomedical Research Support Grant), and the Wayne State University Research Committee. FP thanks Wayne State University for a Thomas F. Rumble Fellowship. ... Francoise Perron, Kim F. Albizati* ...