Table 2 1 H and 13 C in Scabiosa atropurpurea: A rich source of iridoids with α-glucosidase inhibitory activity evaluated by in vitro and in silico studies

Table 2 1 H and 13 C NMR data (J in Hz) of compounds 23, 25 and 28 (CD OD, 600 MHz). 3
232528δCδHδCδHδCδH197.25.54, d (8.5)97.65.32, d (8.5)97.65.32, d (8.5)2––3153.07.44, s152.97.45, s152.97.45, s4113.1–112.0–112.0–529.12.94, m33.03.16, td33.03.16, td(8.0, 8.0,(8.0, 8.0,6.0)6.0)633.02.10, ddd40.62.36, dd40.62.36, dd(14.0, 5.9,(14.0, 8.0)(14.0, 8.0)1.5)1.78, ddd1.78, ddd1.67, ddd(14.0, 6.0,(14.0, 6.0,(14.0, 5.2,5.0)5.0)4.0)7103.84.53, dd78.95.24, br t78.95.24, br t(5.9, 5.2)(5.0)(5.0)8135.75.76, ddd41.22.17, m41.22.17, m(7.5, 10.5,17.7)944.32.69, brdt47.52.12, ddd47.52.12, ddd(8.5, 7.5)(10.8, 8.5,(10.8, 8.5,8.0)8.0)10120.05.33,13.41.10, d (6.8)13.41.10, d (6.8)d (17.7)5.30,d (10.5)11168.2–169.0–169.0–-OCH 351.83.72, s51.53.72, s51.53.72, s1’97.25.54, d (8.5)97.25.54, d (8.5)2’3’153.47.47, s153.47.47, s4’113.1–113.1–5’29.52.97, m29.52.97, m6’34.02.13, ddd34.02.13, ddd(14.0, 6.3,(14.0, 6.3,1.5)1.5)1.68, ddd1.68, ddd(14.0, 5.2,(14.0, 5.2,4.0)4.0)7’103.84.60, dd103.84.60, dd(5.9, 5.2)(5.9, 5.2)8’136.05.76, ddd136.05.76, ddd(7.5, 10.5,(7.5, 10.5,17.7)17.7)9’45.52.71, brdt45.52.71, brdt(8.5, 7.5)(8.5, 7.5)10’120.05.35,120.05.35,d (17.7)d (17.7)5.30,5.30,d (10.5)d (10.5)11’168.2–168.2–-OCH 353.23.32, s53.53.33, s1’’67.03.63, m67.03.63, m3.44, m3.44, m2’’33.21.55, m33.21.55, m(2 H)(2 H)3’’20.81.42, m20.81.42, m(2 H)(2 H)4’’14.60.97, t (7.4,14.60.97, t (7.4,3 H)3 H)1’’ꞌ67.03.63, m3.45, m2’’ꞌ33.21.55, m(2 H)3’’ꞌ20.81.42, m(2 H)4’’ꞌ14.60.97, t (7.4,3 H)β- D-GlcI (at C-1)β- D-GlcI (at C-1)β- D-GlcI (at C-1)199.74.71, d (7.8)100.34.70, d (7.8)100.34.70, d (7.8)274.33.22, dd74.93.21, dd74.93.21, dd(7.8, 9.0)(7.8, 9.0)(7.8, 9.0)378.878.478.4