1. Department of Biological Sciences, HB 6044 Gilman Hall, and Department of Chemistry, Dartmouth College, Hanover, New Hampshire 03755, Wells National Estuarine Research Reserve, Laudholm Farm Road, Wells, Maine 04090, Long Trail Brewery, Bridgewater Corners, Vermont 05035, and Department of Pharmaceutics and Analytical Chemistry, University of Copenhagen, DK-2100 Copenhagen Ø, Denmark