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. 2018 Sep 17;23(9):2377. doi: 10.3390/molecules23092377

Table 1.

1H-NMR data (500 MHz) of 1 and 2 in CDCl3.

Position 1 2
δH, (J in Hz) δH, (J in Hz)
1 2.51, dd (14.3, 7.5); 1.39, dd (14.2, 13.0) 2.23, dd (14.0, 6.6); 1.20 dd (14.4, 13.7)
2 3.08, dd (12.5, 7.7) 2.69 dt (13.7, 7.0)
3 - 2.55 p (7.3)
5 3.46, s 3.29, s
9 4.40, s 4.42, d (2.7)
12 1.87, dt (9.9, 7.1); 1.59, m 1.88, m; 1.63, m
13 1.59, m 1.63, m
14 1.36, m 1.37, dd (9.3, 2.5)
15 2.09, pd (7.0, 2.8) 2.12, qd (6.8, 2.7)
16 0.85, d (7.0) 0.89, d (6.9)
17 0.82, d (6.8) 0.86, d (6.9)
18 5.48, d (1.4); 6.13, d (1.8) 1.03, d (6.3)
19 1.02, s 1.02, s
20 1.31, s 1.30, s