NMR solution geometry of saccharides containing the 6-O-(α-D-glucopyranosyl)-α/β-D-glucopyranose (isomaltose) or 6-O-(α-D-galactopyranosyl)-α/β-D-glucopyranose (melibiose) core

NMR Metabolomics and Chemometrics of Commercial Varieties of Phaseolus vulgaris L. Seeds from Italy and In Vitro Antioxidant and Antifungal Activity

“…Sucrose is a disaccharide with glucose and fructose units, while raffinose and stachyose are mono-and di-galactosyl derivatives of sucrose. Their structures were confirmed by an inspection of the cross peak in the COSY and HSQC spectrum (Figures S4 and S5) and by comparison with the NMR data of Watson et al [65].…”

Anti-Alzheimer Potential of a New (+)-Pinitol Glycoside Isolated from Tamarindus indica Pulp: In Vivo and In Silico Evaluations

“…The 1 H and DEPT-Q 13 C NMR data ( Table 1 , Figures S1 and S2 ) along with the Heteronuclear Single Quantum Correlation Experiment (HSQC) data ( Figure S3 ) suggested seven characteristic resonances appeared as six oxymethine groups at δ H 3.28 (1H, overlapped) δ C 84.4, δ H 3.92 (1H, overlapped) δ C 73.0, δ H 4.55 (1H, m) δ C 73.3, δ H 3.71 (1H, m) δ C 72.2, δ H 3.70 (1H, overlapped) δ C 74.5, δ H 3.81 (1H, overlapped) δ C 71.5, and one methoxy group appeared at δ H 3.63 (1H, s) δ C 60.6, suggesting the characteristic core structure for a cyclitol, a cyclic polyol, (+)-pinitol unit that was previously isolated from T. indica bark [ 21 ]. NMR data also showed five oxymethine groups at δ H 5.14 (1H, d, J = 3.5) δ C 93.5, δ H 3.81 (1H, overlapped) δ C 71.4, δ H 4.06 (1H, overlapped) δ C 77.2, δ H 3.81 (1H, overlapped) δ C 69.1, δ H 3.81 (1H, overlapped) δ C 71.6, and one oxymethylene group at δ H 3.62, 4.04 (2H, m) δ C 64.0, suggesting the characteristic core structure for α - d -glucopyranosyl unit [ 19 , 59 , 60 , 61 ]. NMR data also showed five oxymethine groups at δ H 4.51 (1H, d, J = 8) δ C 97.7, δ H 3.62 (1H, overlapped) δ C 73.8, δ H 3.16 (1H, t) δ C 76.3, δ H 3.87 (1H, overlapped) δ C 70.8, δ H 3.35 (1H, overlapped) δ C 77.5, and one oxymethylene group at δ H 3.81, 4.04 (2H, m) δ C 62.4, suggesting the characteristic core structure for β - d -glucopyranosyl unit [ 60 , 62 ].…”

“…6, and one oxymethylene group at δ H 3.62, 4.04 (2H, m) δ C 64.0, suggesting the characteristic core structure for α-D-glucopyranosyl unit[19,[59][60][61]. NMR data also showed five oxymethine groups at δ H 4.51 (1H, d, J = 8) δ C 97.7, δ H 3.62 (1H, overlapped) δ C 73.8, δ H 3.16 (1H, t) δ C 76.3, δ H 3.87 (1H, overlapped) δ C 70.8, δ H 3.35 (1H, overlapped) δ C 77.5, and one oxymethylene group at δ H 3.81, 4.04 (2H, m) δ C 62.4, suggesting the characteristic core structure for β-D-glucopyranosyl unit [60,62].…”