Calothrix brevissima

Pedersen, M. and DaSilva, E.J., 1973. Simple brominated phenols in the bluegreen alga Calothrix brevissima West. Plants, 115 83—86. 

About 30 brominated derivatives have been identified in marine cyanobacteria. In each of these cases, bromine atoms are fixed on a benzene nucleus, a bis-indolic system, or on a linear chain, but always in the vinylic position. The two simplest compounds are lanosol and 3,5-dibromo-p-hydroxybenzylic alcohol, both isolated from the species Calothrix brevissima (Pedersen and Da Silva, 1973). 

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