TY - DATA T1 - Structural determination of two new acacic acid-type saponins from the stem barks of Albizia zygia (DC.) J. F. Macbr PY - 2018/02/19 AU - Olivier Placide Noté AU - Line Made Simo AU - Joséphine Ngo Mbing AU - Dominique Guillaume AU - Christian Dominique Muller AU - Dieudonné Emmanuel Pegnyemb AU - Annelise Lobstein UR - https://tandf.figshare.com/articles/journal_contribution/Structural_determination_of_two_new_acacic_acid-type_saponins_from_the_stem_barks_of_i_Albizia_zygia_i_DC_J_F_Macbr/5901580 DO - 10.6084/m9.figshare.5901580.v1 L4 - https://ndownloader.figshare.com/files/10526227 KW - 1D and 2D NMR KW - Albizia zygia KW - mimosaceae KW - triterpenoid saponins KW - acacic acid-type saponins N2 - As a continuation of our interest in the study of triterpenoid saponins from Albizia zygia, phytochemical investigation of its stem barks led to the isolation of two new oleanane-type saponins, named zygiaosides C–D (1–2). Their structures were established on the basis of extensive analysis of 1D and 2D NMR (1H-, 13C NMR, DEPT, COSY, TOCSY, ROESY, HSQC and HMBC) experiments, HRESIMS studies, and by chemical evidence as, 3-O-[ β-d-glucopyranosyl-(1→2)-[α-l-arabinopyranosyl-(1→6)]-β-d-glucopyranosyl]-21-O-[(2E,6S)-2,6-dimethyl-6-O-(β-d-quinovopyranosyl) octa-2,7-dienoyl]acacic acid 28-O-α-l-arabinofuranosyl-(1→4)-[β-d-glucopyranosyl-(1→3)]-α-l-rhamnopyranosyl-(1→2)-β-d-glucopyranosyl ester (1) and 3- O-[β-d-glucopyranosyl-(1→2) -[ β-d-fucopyranosyl-(1→6)]-β-d-glucopyranosyl]-21-O-[(2E,6S)-2,6-dimethyl-6-O-(β-D-quinovopyranosyl) octa-2,7-dienoyl]acacic acid 28-O-α-l-arabinofuranosyl-(1→4)-[β-d-glucopyranosyl-(1→3)]-α-l-rhamnopyranosyl-(1→2)-β-d-glucopyranosyl ester (2). ER -