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. 2017 Aug 8;7:7574. doi: 10.1038/s41598-017-07095-x

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© The Author(s) 2017

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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The structures of compounds isolated from the EtOH extracts of S. brachyanthera. (a) brachyantheraoside A1 R₁ = ara- R₂ = glc1-6glc- R₃ = OH. (b) brachyantheraoside A3 R₁ = glcaOMe¹-³glc- R₂ = rha¹-⁴glc¹-⁶glc- R₃ = OH. (c) brachyantheraoside A4 R₁ = ara¹-⁴ara¹-³ara- R₂ = rha¹-⁴glc¹-⁶glc- R₃ = H. (d) brachyantheraoside A5 R₁ = ara¹-(xyl¹-²) ³ara¹-³ara- R₂ = rha¹-⁴glc¹-⁶glc- R₃ = H. (e) YM7 R₁ = glc¹-³rha¹-²ara- R₂ = rha¹-⁴glc¹-⁶glc- R₃ = H. (f) YM9 R₁ = rha¹-²ara- R₂ = rha¹-⁴glc¹-⁶glc- R₃ = H. (g) YM10 R₁ = ara- R₂ = glc¹-⁶glc- R₃ = H. (h) YM11 R₁ = rha¹-²ara- R₂ = glc¹-⁶glc- R₃ = H. (i) YM13 R₁ = ara- R₂ = rha¹-⁴glc¹-⁶glc- R₃ = H. (j) brachyantheraoside B6 R₁ = H R₂ = rha¹-²glc-O-. (k) brachyantheraoside B9 R₁ = ara¹-(rha¹-²) ³glc- R₂ = H.