Abstract
Two new oleanane-type triterpenoid saponins with two angeloyls at C-21, C-22, and a branch of tetrasaccharide moiety (Rha, Cal, Glc, GlcA, or Rha, Xyl, Glc, GlcA) at C-3 were isolated from leaves of Schima superba Gardn. et Champ. Their structures were established using one- and two-dimensional NMR and high resolution electrospray ionization mass spectrometry as 21,22-di-O-angeloyl-R1-barrigenol-3-O–{β-d-glucopyranosyl-(1→2)-β-d-galactopyranosyl-(1→2)-[α-l-rhamnopyranosyl-(1→4)]}-β-d-glucuronopyranoside, named schimasuoside A(1), 21,22-di-O-angeloyl-R1-barrigenol-3-O-{β-d–glucopyranosyl-(1→2)-β-d–xylopyranosyl-(1→2)-[α-l-rhamnopyranosyl-(1→4)]}-β-d-glucuronopyranoside, named schimasuoside B (2). There are strong antifungal effect of their mixture on Magnaporthe oryzae.
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Acknowledgments
The authors are very grateful to Dr. Min Xu of Kunming Institute of Botany, Chinese Academy of Sciences, for her help in structure identification, Dr. Hongtao Zhu and Dr. Dong Wang of Kunming Institute of Botany, for their help in HPLC facility. This project was supported by National Natural Science Foundation of China (31060250) and the Natural Science Foundation of Jiangxi Province (2009GXN0029).
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Huo, G., Zhang, C., Zhang, Y. (2014). Structure Elucidation of Two Triterpenoid Saponins from Leaves of Schima superba Gardn. et Champ. In: Zhang, TC., Ouyang, P., Kaplan, S., Skarnes, B. (eds) Proceedings of the 2012 International Conference on Applied Biotechnology (ICAB 2012). Lecture Notes in Electrical Engineering, vol 250. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-37922-2_98
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DOI: https://doi.org/10.1007/978-3-642-37922-2_98
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