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Two new lignan glycosides, ussuriensislignan A (1) and ussuriensislignan B (2), together with seventeen known compounds (3–19), were isolated from the fruits of Pyrus ussuriensis. Their structures were determined by various spectroscopic methods. This is the first report of the isolation of lignans (compounds 1–3) from the genus Pyrus, and compounds 3–6, 12–16 were reported from Pyrus for the first time.
We are grateful to Prof. Benjamin Clark for polishing the language.
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