Denigrins H-L: Sulfated Derivatives of Denigrins D and E from a New Zealand c.f. Marine Sponge.

Five new sulfated arylpyrrole and arylpyrrolone alkaloids, denigrins H-L (-), along with two known compounds, dictyodendrin B and denigrin G, were isolated from an extract of a New Zealand c.f. marine sponge.

Investigation of the Dietary Preferences of Two Dorid Nudibranchs by Feeding-Choice Experiments and Chemical Analysis.

Feeding-choice experiments were conducted under laboratory conditions with two dorid spongivorous nudibranchs, Goniobranchus aureomarginatus and Ceratosoma amoenum, collected from a sponge meadow off Tauranga, New Zealand with two sponge prey (Dysidea teawanui sp.nov. and an undescribed species from the Dictyodendrillidae family, possibly Dictyodendrilla tenella (Lendenfeld 1888).

A Revised Structure and Assigned Absolute Configuration of Theissenolactone A.

Antimicrobial bioassay-guided fractionation of led to the isolation of a γ-lactone with a furo[3,4-]pyran-5-one bicyclic ring system () and three known compounds, (3,4)-4-hydroxymellein (), (3,4)-4-hydroxymellein () and 7-hydroxy-3-(1-hydroxyethyl)isobenzofuran-1(3)-one (). Structure elucidation was conducted by NMR spectroscopic methods. Absolute configuration of (2, 3, 5, 7 8) was established using the chiral derivatizing agent MPA and was fully supported by calculated specific rotation and ECD spectra.