Showing papers by "Shu-Ming Li published in 1991"
TL;DR: Five new phlorotannins were obtained from an ethanolic extract of the brown alga Carpophyllum maschalocarpum after peracetylation, containing more 1,4-diphenoxylated 3,5-diacetoxy-benzene rings than the corresponding fuhalols; carmalols have dibenzo[1,4]dioxin units.
24 citations
TL;DR: The structural elucidation of 20 phloroglucinol derivatives isolated from the ethanolic extract of the brown alga Carpophyllum maschalocarpum after peracetylation revealed a new group of phlorotannins called hydroxyphlorethols.
17 citations
TL;DR: 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.
11 citations
TL;DR: Using HPLC ten phlorotannins belonging to the group of fuhalols were isolated from an ethanolic extract of Landsburgia quercifolia as peracetates after acetylation to establish the structures of the isolated compounds.
Abstract: Using HPLC ten phlorotannins belonging to the group of fuhalols were isolated from an ethanolic extract of Landsburgia quercifolia as peracetates after acetylation. The structures of the isolated compounds were established by means of spectroscopic analysis, /. e. H NMR spectra and direct comparison with spectra of authentic substances. Similar to Sargassum muticum, the alga Landsburgia quercifolia contains exclusively phlorotannins of fuhaloltype.
4 citations