2005 Benzopyran derivatives R 0350 Constituents of Swertia japonica Makino. Part 1. The Structures of New SecoiriDiglycosides. — Compounds (I*) are the first naturally occurring iridoid digly15- 128 doid cosides having an alpha-D-mannopyranosyl and beta-D-fructofuranosyl unit, respectively. — (KIKUCHI, M.; KIKUCHI*, M.; Chem. Pharm. Bull. 52 (2004) 10, 1210-1214; Tohoku Pharm. Univ., Aoba, Sendai 981, Japan; Eng.) — H. Toeppel
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