The rare prostaglandin methyl (5Z)-9,15-dioxoprosta-5,8(12)-dien-1-oate (1)
, hitherto unreported as a natural product, has been isolated from the Indi
an Ocean soft coral Sarcophyton crassocaule. Its structure was elucidated u
sing detailed spectral (H-1 and C-13 NMR, DEPT, H-H COSY, C-H COSY, HRMS, a
nd HMBC) analysis.