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■ Absolute Stereostructures of Acylated Khellactone-Type Coumarins from Angelica furcijuga

Toshio Morikawa, Hisashi Matsuda, Teruki Ohgushi, Norihisa Nishida, Tomoko Ishiwada, and Masayuki Yoshikawa

*Kyoto Pharmaceutical University, Misasagi, Yamashina-ku, Kyoto 607-8412, Japan

Abstract

Two new acylated khellactone-type coumarin hyuganoside I (1) and hyuganin F (2) were isolated from the leaves of Angelica furcijuga. Their absolute stereostructures were determined on the basis of chemical and physicochemical evidence. Furthermore, the absolute stereostructures of the acyl moieties in hyuganins A (3) and C (4) and isoepoxypteryxin (5) were elucidated.