Abstract
Two tetrahydroxanthones, 1,3,5S,8S-tetrahydroxy-5,6,7,8-tetrahydroxanthone (1) and 1,3,5R,8S-tetrahydroxy-5,6,7,8-tetrahydroxanthone (2), and six new tetrahydroxanthone glycosides, amarellins A–F (3–8), were isolated from the aerial parts of a Mongolian medicinal plant Gentianella amarella ssp. acuta (Gentianaceae). The structures of 1–8 were elucidated on the basis of spectroscopic analysis, chemical conversion, and ECD calculation. Amarellins A–C (3–5) were assigned as 8-O-β-d-glucoside, 8-O-β-d-xyloside, and 1-O-β-d-glucoside of 1, respectively, while amarellins D–F (6–8) were elucidated to be 8-O-β-d-xyloside, 1-O-β-d-glucoside, and 3-O-β-d-glucoside of 2, respectively.
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This work was partly supported by a Grant-in-Aid for Scientific Research from the Ministry of Education, Culture, Sports, Science and Technology of Japan.
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Lu, S., Tanaka, N., Kawazoe, K. et al. Tetrahydroxanthones from Mongolian medicinal plant Gentianella amarella ssp. acuta . J Nat Med 70, 780–788 (2016). https://doi.org/10.1007/s11418-016-1015-z
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DOI: https://doi.org/10.1007/s11418-016-1015-z