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Planta Med 2012; 78 - PI3
DOI: 10.1055/s-0032-1320690
DOI: 10.1055/s-0032-1320690
New spongians isolated from a species of Cacospongia SP
Two norditerpenes (1–2) and one diterpene (3) were isolated from a tropical Suluwesi sponge in the genus Cacospongia sp. (Order Dictyoceratida, Family Thorectidae). Diterpene 3 contains a unique pyridine moiety as the D ring. The structures of 1–3 were deduced by analysis of the spectrometric and spectroscopic data. The structure elucidation of 3 was complicated by the rapid exchange of the axial proton at the C-11 position with deuterium from methanol.