C. No δC δH/ppm (multi, integral, J/Hz) HMBC
1 33.8 2.23 (1H, s) C3,C5
    1.82 (1H, m) C4, C10
2 25.6 2.01 (1H, m)  
    1.18 (1H, m)  
3 77.9 3.43 (IH, dd, 10.5 and 4.0)  
4 37.3    
5 55.7 2.03(1H, m) C8, C10
6 18.7 1.65(1H, d, 3.6)  
    1.45 (1H, d, 3.0) C5, C9, C14
7 33.4 1.46 (1H, m)  
    1.34 (1H, m)  
8 39.6    
9 47.8 1.57 (1H, m)  
10 35.4    
11 23.7 1.84 (1H, m) C8, C13
    1.20 (1H, m)  
12 124.9    
13 140.5    
14 39.5    
15 28.1 1.80 (1H, m)  
16 24.6 0.99 (1H, m) C14, C18
    1.57 (1H, m)  
17 42.6    
18 43.3 0.85 (1H, s) C14, C16
19 83.1 4.13 (1H, d, 5.4)  
20 39.3    
21 40.3 1.95 (1H, m)  
    1.47 (1H, m)  
22 39.1 1.63 (1H, m)  
    1.52 (1H, m)  
23 16.6 1.04 (3H, s) C3, C5
24 28.7 1.22 (3H, s) C3, C5
25 15.8 0.94 (3H, s) C1,C 9
26 21.2 1.21 (3H, s) C9, C14
27 24.0 1.07 (3H, s) C7, C15
28 24.8 0.80 (3H, s) C16, C22
29 182.3    
30 17.1 0.90 (3H, s) C19, C21, C29
Table 1: 1H and 13C NMR of ficusonolide (1) (500 MHz (1H NMR) and 125 MHz (13C), C5D5N, δ in ppm, J in Hz).