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Rigenolides D–H, norsecoiridoid and secoiridoids from Gentiana rigescens Franch

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Abstract

Five new compounds, rigenolides D–H (15), were isolated from the aerial parts of Gentiana rigescens Franch. Their structures were assigned by detailed spectroscopic analyses and chemical conversions. Rigenolides D (1) and E (2) were elucidated to be a secoiridoid and a norsecoiridoid, respectively, possessing a dienone moiety in common. Rigenolides F–H (35) were assigned as acylated secoiridoid glucosides.

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Acknowledgements

This work was partly supported by JSPS KAKENHI Grant numbers JP18406028 and JP17K08337.

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Correspondence to Yoshiki Kashiwada.

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Suyama, Y., Tanaka, N., Kawazoe, K. et al. Rigenolides D–H, norsecoiridoid and secoiridoids from Gentiana rigescens Franch. J Nat Med 72, 576–581 (2018). https://doi.org/10.1007/s11418-018-1181-2

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  • DOI: https://doi.org/10.1007/s11418-018-1181-2

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