Crannenols A-D, Sesquiterpenoids from the Irish Deep-Sea Soft Coral Acanella arbuscula .

Four undescribed sesquiterpenoids, crannenols A-D (-), have been isolated from CHCl and MeOH extracts of the deep-sea bamboo coral . The corals were collected from a submarine canyon on the edge of Ireland's Porcupine Bank via a remotely operated vehicle. The structure elucidation of these (,)-α-farnesene derivatives was achieved using a combination of 1D and 2D NMR, electron impact (, ), and electrospray ionization (, ) mass spectrometry.