Laurencia japonensis

Two brominated C15 nonterpenoid compounds, japonenyne A (223) and B (224), with a novel 2,7-dioxabicyclo[4.3.0]nonane skeleton, have been isolated from the red alga Laurencia japonensis [172]. 

A collection of Laurencia elata from the coast of Victoria has provided the pyrano[3,2-7>]pyranyl vinyl acetylene elatenyne (666) (772), which is related to the known (Z)-dactomelyne (7). Japonenynes A (667), B (668), and C (669), which possess a furo[3,2-h]pyranyl framework, were isolated from Laurencia japonensis (773). Compound 669 may be an isolation (methanol) artifact although it is isolated as a single compound. The report of aplysiallene from the sea hare Aplysia kurodai (774) is erroneous and this compound is actually a known bromoallene (775) described earlier (7). The Vietnamese Laurencia pannosa contains pannosallene (670), which is closely related to the known laurallene... 

Takahashi Y, Suzuki M, Abe T, Masuda M (1998) Anhydroaplysiadiol from Laurencia japonensis. Phytochemistry 48 987... 

Takahashi, Y., Suzuki, M., Abe, T, and Masuda, M. (1998b) Anhydroaplysiadiol from Laurencia japonensis. Phytochemistry, 48, 987-990. 

---