New acidic terpenoids from Pseudopterogorgia acerosa

One new cembranoid (1) and two new pseudopteranoids (2 – 3) were found in the Gorgonian coral Pseudopterogorgia acerosa collected in the Bahamas. These compounds demonstrate the rare carboxylic acid substitution pattern at C-18. Isolation of these compounds was performed using a combination of reversed phase column chromatography and preparative high pressure liquid chromatography. The structural elucidation was performed using extensive spectroscopic analysis, including mass spectrometry and 1D and 2D NMR spectroscopy.