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Table 1 1H-NMR spectral data for compounds 2, 3, 4 and 5 in CDCl3a (400 MHz)

From: Isolation of anticancer constituents from Cucumis prophetarum var. prophetarum through bioassay-guided fractionation

H (2) (3) (4) (5)
1 α 2.32 ddd (3.3/ 5.8 /12.5) 2.24 m 2.33 ddd (3.3/ 5.8 /12.5) s.o.
1.21 d (13.0) 1.21 d (12.8) 1.21 m 1.15 d (6.30)
2 4.43 dd (4.44/12.9) 4.43 dd (6.0/12.8) 4.46 dd (6.5/12.8) 3.59 m
3 2.98 d (9.0)
4
5
6 5.80 d(5.6) 5.78 d br (5.6) 5.79 br m 5.73 d (5.4)
s.o. s.o. 1.94 m s.o
2.41 dm 2.41 dd (7.5/19.1) 2.40 dd (8.2/19.8) 2.39 m
8 1.98 br d (7.8) 2.01 d (6.8) 1.97 d br (7.9) 1.93 br d (7.6)
9
10 2.75 br d (13.1) 2.50 d (14.3) 2.78 d (13.7) 2.62 br d (14.4)
11  
12α 3.25 d (14.4) 3.32 d (14.5) 3.32 d (14.3) 3.18 d (14.4)
12β 2.69 d (14.7) 2.76 d (12.7) 2.7 d (14.6) 2.52 d (6.81)
13
14
15α 1.88 dd(9.4/13.5) s.o s.o. s.o.
15β 1.45 d (5.8) 1.93 dd (11.7/19.8) 1.84 dd (8.2/13.1) 1.85 m
16 4.36 m 4.92 m 4.33 m br 4.33 m
17 2.51 d (7.3) 3.17 d (6.45) 2.55 d (6.88) 2.48 d (7.03)
18 0.99 s 0.66 s 0.98 s 0.96 s
19 1.08 s 1.05 s 1.8 s 1.27 s
20
21 1.43 s 2.16 s 1.39 s 1.55 s
22  
23 6.48 d (15.6) 6.60 d (15.1) 6.46 d (15.6)
24 7.07 d (15.6) 7.14 d (15.1) 7.07 d (15.6)
25
26 1.55 s 1.35 s 1.57 s
27 1.57 s 1.35 s 1.55
28 1.29 s 1.27 s 1.30 s 1.27 s
29 1.35 s 1.33 s 1.33 s 1.20 s
30 1.36 s 1.37 s 1.34 s 1.10 s
O2CMe 2.02 s 2.02 s
  1. a j values in Hz are given in parentheses, (so) signal obscured, (s) singlet, (d) doublet, (dd) doublet of doublets, (m) multiplet, (br) broad
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