1. Department of Chemistry, University of Hawai'i at Manoa, Honolulu, Hawaii 96822-2275, College of Pharmacy, Oregon State University, Corvallis, Oregon 97331, and Marine Ecology and Aquaculture Group, National Institute of Water and Atmospheric Research (NIWA), Taihoro Nukurangi, Private Bag 109-695 Newmarket, Auckland, New Zealand