FUCOPHLORETHOLS FROM THE BROWN ALGA CARPOPHYLLUM-MASCHALOCARPUM

Six new phloroglucinol derivatives belonging to the class of fucophlorethols with four to 14 rings were isolated together with the known bisfucotriphlorethol pentadecaacetate and its monodeacetylated derivative from an ethanolic extract of the brown alga Carpophyllum maschalocarpum using HPLC. By means of spectral analysis, the following compounds were identified: hydroxyfucodiphlorethol undecaacetate, hydroxybisfucotriphlorethol hexadecaacetate, terfucopentaphlorethol docosaacetate, terfucohexaphlorethol tetracosaacetate, hydroxyterfucohexaphlorethol pentacosaacetate and quaterfucononaphlorethol triacontaacetate. The last one, containing 14 phloroglucinol units, is the most complex phlorotannin isolated in purified form to date.