Six New Spongian Diterpenes from the SpongeSpongiamatamata

Chemical investigation of the sponge Spongia matamata collected in Yap, Micronesia, has resulted in the isolation of six new spongian diterpenoids, 2-7, along with the known compound, spongia-13(16),-14-dien-19-oic acid (1). The structures were determined by spectroscopic methods.