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A new brominated, anhydroaplysiadiol has been isolated from a new Laurencia species, L. japonensis Abe et Masuda sp. ined., along with aplysiadiol and 2,10-dibromo-3-chloro-α-chamigrene. The last two compounds are commonly found in this species collected from various localities. The structure of anhydroaplysiadiol was deduced from spectral evidence.
Chemical compositions of three collections of the red alga Laurencia nipponica from the western part of the Sea of Japan were studied. One of them contained a series of the previously known sesquiterpenoids. Another one gave C 15 bromoallene ethers, predominantly. Finally, two new halogenated diterpenes, 15-bromoparguer-9(11)-ene-16-ol and 15-bromoparguer-7-ene-16-ol, were isolated from the...
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