Experimental Procedures Synthesis of Lycophyll, General. Crocetindialdehyde (8) was obtained from SynChem, Inc. (Des Plaines, IL) as a brick-red solid and was used without further purification. Acetic acid 3,7-dimethyl-8-oxo-octa-2,6-dienyl ester (2)35 was synthesized by literature procedures from commercially available geranyl acetate (1). All other reagents and solvents used were purchased from Acros Organics (Morris Plains, NJ) and Sigma-Aldrich (St. Louis, MO) and were used without further purification. All reactions were performed