Guaiacylglycerol-7 '-0-methyl 8-vanillic acid ether and related compounds from Boreava orientalis

The threo and erythro forms of guaiacylglycerol-7'-O-methyl 8'-vanillic acid ethers, threo and erythro guaiacylglycerol 8'-vanillin ethers, and threo guaiacylglycerol 8'-(4-hydroxymethyl-2-methoxyphenyl) ether have been isolated from fruits of Boreava orientalis. Structural determinations were made on the basis of UV, MS, H-1- and C-13-NMR spectral data, including two-dimensional shift correlation. The relative configurations were assigned on the basis of H-1-NMR chemical shifts. Copyright (C) 2003 John Wiley Sons, Ltd.