Tridachiella diomedea

Ireland, C. and Faulkner, D. J., The metabolites of the marine molluscs Tridachiella diomedea and Tridachia crispata, Tetrahedron, 37 (Suppl. 1), 233, 1981. 

Under the same conditions, photolysis in benzene of 9,10-deoxytridachione (6), isolated from Tridachiella diomedea, " a marine mollusc, using a 450-W Hanovia lamp for three hours gave a simple photoproduct 7 (R = H) in 85% yield having the bicyclo[3.1.0]hexene ring system of crispatene (R = COEt) found in Tridachia crispata, another mollusc from the Caribbean. 

The same transformation was subsequently conducted in vitro from substances isolated from Tridachiella diomedea and Tridachia crispata (Ireland and Faulkner, 1981). Thus, several polypropionates, such as cyercene, pladdene and deoxytridachione, that undergo in vivo photoisomerization may have a role in photoprotection (Zuidema and Jones, 2005). 

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