Synthesis and Mass Spectrometric Analysis of CyclostellettaminesH, I, K and L

Synthesis and Mass Spectrometric Analysis of CyclostellettaminesH, I, K and L Ingenamine G and Cyclostellettamines G−I, K, and L from the New Brazilian Species of Marine Sponge<i>Pachychalina</i>sp. Ingenamine G and Cyclostellettamines G−I, K, and L from the New Brazilian Species of Marine Sponge<i>Pachychalina</i>sp. Cyclostellettamines A-F, pyridine alkaloids which inhibit binding of methyl quinuclidinyl benzilate (QNB) to muscarinic acetylcholine receptors, from the marine sponge, Stelletta maxima Cyclobutastellettolides A and B, C₁₉ Norterpenoids from a <i>Stelletta</i> sp. Marine Sponge Proline-Containing Cyclopeptides from the Marine Sponge <i>Phakellia fusca</i> Proline-Containing Cyclopeptides from the Marine Sponge <i>Phakellia fusca</i> Isolation and Structure of the Marine Sponge Cell Growth Inhibitory Cyclic Peptide Phakellistatin 1 Isolation and Structure of the Cytotoxic Cycloheptapeptide Phakellistatin 13 Isolation and Structure of the Cytotoxic Cycloheptapeptide Phakellistatin 13