(−)-Echinobetaine A: Isolation, Structure Elucidation, Synthesis, and SAR Studies on a New Nematocide from a Southern Australian Marine Sponge, Echinodictyum sp.

(−)-Echinobetaine A: Isolation, Structure Elucidation, Synthesis, and SAR Studies on a New Nematocide from a Southern Australian Marine Sponge, <i>Echinodictyum</i> sp. Echinosulfonic Acids A−C and Echinosulfone A: Novel Bromoindole Sulfonic Acids and a Sulfone from a Southern Australian Marine Sponge, <i>Echinodictyum</i> Novel Betaines from the Marine Sponge <i>Agelas dispar</i> Novel Betaines from the Marine Sponge <i>Agelas dispar</i> Nematocidal Thiocyanatins from a Southern Australian Marine Sponge <i>Oceanapia</i> sp. Onnamide F:  A New Nematocide from a Southern Australian Marine Sponge, <i>Trachycladus </i><i>l</i><i>aevispirulifer</i> Onnamide F:  A New Nematocide from a Southern Australian Marine Sponge, Trachycladus laevispirulifer Nakinadine A, a novel bis-pyridine alkaloid with a β-amino acid moiety from sponge Amphimedon sp. Equilibrating Isomers: Bromoindoles and a Seco-Xanthine Encountered during a Study of Nematocides from the Southern Australian Marine Sponge <i>Hymeniacidon</i> sp. Dendridine A, a Bis-indole Alkaloid from a Marine Sponge <i>Dictyodendrilla</i> Species