81757-70-2Relevant academic research and scientific papers
Polyhydroxy Biphenyl Ethers from the Brown Alga Cystophora congesta
Gregson, Richard P.,Daly, John J.
, p. 649 - 657 (2007/10/02)
Two new phloroglucinol polymers have been isolated from the aqueous extract of the brown alga Cystophora congesta.They are the linear trimer 2,2',4,6,6'-pentahydroxy-1'-(3,5-dihydroxyphenoxy)-biphenyl ether (1) and the isomeric angular trimer 3,4',5,6'- or 3,3',5,5'-trtrahydroxy-2'-(3,4,5-trihydroxyphenoxy)biphenyl ether which was characterized as its heptaacetoxy derivative (4).Structures were elucidated principally from an analysis of 13C n.m.r. chemical shifts and 13C-1H spin-spin coupling data.X-ray analysis was performed on the heptaacetoxy derivative of (1) to distinguish it from a regio-isomer(3).
