The discovery of new phloroglucinol glycosides from and the mechanism of oxidative dearomatization of the methyl-substituted phloroglucinol derivatives.

Six methyl-substituted phloroglucinol glycosides (1-6) were isolated from , including four new compounds (1-3, 6). The aglycones (1a-4a) of 1-4 and their corresponding oxidized products (1c-4c) were also obtained from . The structures were determined by a series of spectroscopic analyses and chiral separation.

An ingenious method for the determination of the relative and absolute configurations of compounds containing aryl-glycerol fragments by H NMR spectroscopy.

A concise method was established to determine the relative and absolute configurations of aryl-glycerols that depend on the chemical shift differences (Δ) of the diastereotopic methylene protons (H-3) by H NMR spectroscopy. When using DMSO- as the preferred solvent, the configuration corresponded to a larger Δ value (>0.15 ppm), whereas the configuration (<0.