Table 2. NMR spectra of compounds isolated from UV-C irradiated mulberry leaves

ID no	Chemical shifts¹⁾ (δ ppm)		Ref
1	¹H	7.43 (1H, d, J=9, C-3'), 6.48 (1H, dd, J=2.4, 2.4, C-5'), 6.42 (1H, d, J=2.4, C-6'), 6.33 (1H, d, J=2.4, C-8), 6.18 (1H, d, J=1.8, C-6)	20
1	¹³C	177. 8, 165.5, 162.8, 162.5, 159.0, 157.8, 150.0, 136.6, 132.2, 111.6, 109.2, 105.1, 104.7, 99.3, 64.6	20
2	¹H	8.09 (1H, d, J=15.6, C-β), 7.89 (1H, d, J=9.0, C-6), 7.70 (1H, d, J=15.6, C-α), 7.52 (1H, d, J=8.4, C-6'), 6.39 (1H, dd, J=2.4, 2.4, C-5), 6.37 (1H, dd, J=2.4, 2.4, C-5'), 6.35 (1H, d, J=2.4, C-3'), 6.29 (1H, d, J=2.4, C-3)	3
2	¹³C	194.2, 167.4, 166.1, 162.8, 160.8, 142.1, 133.1, 132.4, 117.6, 115.6, 114.9, 109.1, 109.0, 103.8, 103.6	3
4	¹H	7.22 (1H, d, J=9.0, C-6'), 6.35 (2H, m, J=9.0, C-3', 5'), 5.91 (1H, d, J=2.4, C-8), 5.87 (1H, d, J=2.4, C-6), 5.39 (1H, d, J=11.4, C-2), 4.78 (1H, d, J=11.4, C-3)	23
4	¹³C	197.5, 167.2, 163.9, 163.6, 158.8, 157.2, 129.4, 114.1, 106.4, 102.2, 100.5, 95. 7, 94.8, 78.6, 71.1	23
8	¹H	7.30 (1H, d, J=9.0, C-3), 7.21 (1H, d, J=16.2, C-β), 6.76 (1H, d, J=16.2, C-α), 6.46 (2H, s, C-2', 6'), 6.30 (2H, m, J=11.4, C-5, 6), 5.24 (1H, m, J=18.0, C-8'), 3.31 (1H, m, J=6.6, C-7'), 3.27 (2H, d, J=6.6, C-7'), 1.72 (3H, s, C-10'), 1.62 (3H, s, C-11')	28
8	¹³C	159.0, 157.2, 138.5, 131.0, 128.2, 126.7, 124.7, 123.7, 118.1, 115.4, 108.4, 105.6, 103.6, 49.9, 26.0, 23.3, 17.9	28
11	¹H	7.63 (1H, d, J=2.4, C-2'), 7.51 (1H, dd, J=1.8, 2.4, C-6'), 6.79 (1H, d, J=9.0, C-5'), 6.32 (1H, d, J=2.4, C-8), 6.13 (1H, d, J=1.8, C-6), 5.17 (1H, d, J=7.2, C-1’’), 3.2-3.6 (br m, rest H of glucose)	29
13	¹H	8.07 (1H, d, J=15.0, C-β), 7.74 (1H, d, J=9.0, C-6'), 7.7 (1H, d, J=15.0, C-α), 7.49 (1H, d, J=9.0, C-5), 6.4 (1H, d, J=9.0, C-5'), 6.35 (1H, dd, J=2.4, 2.4, C-6), 6.34 (1H, d, J=2.4, C-3'), 5.23 (1H, t, J=15.0, C-8), 3.31 (2H, d, J=7.8, C-7), 1.77 (3H, s, C-11),1.65 (3H, s, C-10)	30
15	¹H	7.32 (1H, d, 8.4, C-4), 6.86 (1H, d, 1.8, C-7), 6.82 (1H, d, 1.2, C-3), 6.76 (2H, s C-2', 6'), 6.71 (1H, dd, 2.4, 6.0, C-5), 5.25 (1H, t, 7.2, C-2''), 3.31 (1H, m, C-1''), 1.77 (3H, s C-5''), 1.66 (3H, s C-4'')	31
21	¹H	8.05 (2H, d, J=8.9, C-2', 6'), 6.89 (2H, d, J=8.6, C-3', 5'), 6.40 (1H, s, C-8), 6.21 (1H, s, C-6), 5.25 (1H, d, J=7.2, C-1’’), 3.2-3.7 (br m, rest H of glucose)	29
28	¹H	7.19 (1H, s, C-4), 6.87 (1H, s, C-7), 6.85 (1H, s, C-3), 6.73 (2H, d, J=2.2, C-2', 6'), 6.21 (1H, t, J=2.1, 2,2, C-4'), 5.36 (1H, t, J=7.3, 7.3, C-9), 3.32 (2H, d, J=7.3, C-8), 1.74 (3H, s, C-11), 1.28 (3H s, C-12)	32

¹⁾ 600 MHz, CD3OD solvent, s; singlet, d; doublet, dd; double doublet, m; multiplet, J; coupling constant (Hz), carbon numbers are presented in Fig. 5.