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

Four undescribed sesquiterpenoids, crannenols A-D ( 1 - 4 ), have been isolated from CHCl 2 and MeOH extracts of the deep-sea bamboo coral Acanella arbuscula . 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 ( Z , E )-α-farnesene derivatives was achieved using a combination of 1D and 2D NMR, electron impact ( 1 , 2 ), and electrospray ionization ( 3 , 4 ) mass spectrometry.