10.1246/cl.1988.163
The research aimed to isolate and elucidate the structure of a novel phenylpropanoid glycoside from Magnolia obovata Thunb., a plant used in Japanese traditional medicine for treating neurosis and gastrointestinal complaints. The study successfully isolated magnoloside A, a new phenylpropanoid glycoside containing a rare allopyranose as the inner sugar moiety. The structure was determined using spectroscopic and chemical methods, revealing it to be 3,4-dihydroxy-β-phenylethyl-O-α-L-rhamnopyranosyl-(1→2)-3-O-caffeoyl-β-D-allopyranoside. The findings are significant as magnoloside A represents the first reported phenylpropanoid glycoside with allopyranose as the inner sugar core, expanding the known diversity of phenylpropanoid glycosides and potentially offering new insights into the pharmacological properties of Magnolia obovata.