2.5. Identification
Bruker Spectrospin 400 MHz NMR-spectrometer was used for HNMR and CNMR characterization of pure compounds. The information obtained is as follows:
Compound No.1: H- NMR (400MHz, DMSO): δ 5 (s, 1H, H-1), 6.37 (d, 1H, J = 5.83 Hz, H-3), 5.16 (bdd, 1H, H-4), 2.80 (s,1H, H-5), 4.44 (s,1H, H-6), 5.82 (s, 1H, H-7), 2.80 (s, 1H, H-9), 4.16 (b, 1H, H-10a), 4.20 (b, 1H, H-10b), 4.5 (d, 1H, J = 7.9 Hz, H-1'), 4.83 (m, 1H, H-1''), 5.22 (dd, 1H, J = 10.18 and 3.4 Hz, H-2''), 1.17 (d, 1H, J = 6.12 Hz, H-6''), 7.7 (d, 1H, H-2'''), 7.43 (1H, H-3'''), 7.43 (1H, H-4'''), 7.43 (1H, H-5'''), 7.7 (d, 1H, H-6'''), 6.55 (d, 1H, J = 16 Hz, H-7'''), 7.58 (d, 1H, J = 16 Hz, H-8'''), 2.01 (s, 3H, H-Acyl), 2.12 (s, 3H, H-Acyl).
Compound No.1: C NMR spectral data (DMSO):95.29 (C-1), 140.78 (C-3), 104.07 (C-4), 42.00 (C-5), 87.57(C-6), 124.67 (C-7), 149.8 (C-8), 46.83(C-9), 59.53(C-10), 98.02(C-1'), 73.41(C-2'), 76.63 (C-3'), 70.09 (C-4'), 77.25 (C-5'), 61.00 (C-6'), 96.29(C-1''), 68.88 (C-2''), 69.38 (C-3''), 70.44 (C-4''), 66.26 (C-5''), 17.39(C-6''), 133.72 (C-1'''), 129.04 (C-2'''), 128.65 (C-3'''), 130.89 (C-4'''), 128.65 (C-5'''), 129.04 (C-6'''), 117.03 (C-7'''), 145.67 (C-8'''), 165.38(C-C = O), 169.71 and 20.58(C-Acyl1), 169.83 and 20.72 (C-Acyl).
Compound No.2: 1H- NMR (400MHz, DMSO): δ 4.84 (s, 1H, H-1), 6.37 (d, 1H, J = 5.8 Hz, H-3), 5.05 (m, 1H, H-4), 2.81 (s,1H, H-5), 4.44 (s,1H, H-6), 5.82 (s, 1H, H-7), 2.81 (s, 1H, H-9), 4.17 (b, 1H, H-10a), 4.20 (b, 1H, H-10b), 4.5 (d, 1H, J = 7.8 Hz, H-1'), 4.99 (b, 1H, H-1''), 5.16 (dd, 1H, J = 10.18 and 3.1 Hz, H-2''), 1.14 (d, 1H, J = 6.05 Hz, H-6''), 7.69 (d, 1H, J = 8.9 Hz, H-2'''), 6.97 (d, 1H, J = 8.6 Hz, H-3'''), 6.97 (d, 1H, J = 8.6 Hz, H-5'''), 7.69 (d, 1H, J = 8.9 Hz, H-6'''), 6.49 (d, 1H, J = 16 Hz, H-7'''), 7.66 (d, 1H, J = 16 Hz, H-8'''), 3.79 (s, 3H, H-OMe), 1.88 (s, 3H, H-Acyl), 2.11 (s, 3H, H-Acyl).
Compound No.2: C NMR spectral data (DMSO): 95.35 (C-1), 140.82 (C-3), 104.08 (C-4), 42.07 (C-5), 87.66(C-6), 124.74 (C-7), 149.77 (C-8), 46.86(C-9), 59.56(C-10), 98.02(C-1'), 73.43(C-2'), 76.65 (C-3'), 70.09 (C-4'), 77.27 (C-5'), 61.05 (C-6'), 96.36(C-1''), 68.85 (C-2''), 69.3 (C-3''), 70.09 (C-4''), 66.42 (C-5''), 17.42(C-6''), 126.47 (C-1'''), 130.51 (C-2'''), 114.47 (C-3'''), 161.43 (C-4'''), 114.47 (C-5'''), 130.51 (C-6'''), 113.6 (C-7'''), 145.66 (C-8'''), 165.79(C-C = O), 55.41(C-OMe), 169.8 and 20.52(C-Acyl1), 169.86 and 20.74 (C-Acyl).