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Table 1 The 1 H and 13 C NMR data of Dioscorealide B

From: Immunomodulatory activity of Dioscorea membranacea Pierre rhizomes and of its main active constituent Dioscorealide B

Position Dioscorealide B (in DMSO-d6)
1H(mult, J in Hz)a 13C HMBC (c→H)
1   168.9  
1a   114.9 H-3
1b   136.8 H-2
2 7.76 (d, 8.5) 121.2  
3 7.88 (d, 8.5) 128.2 H-4
3a   138.5 H-2
3b   116.3 H-3,H-4
4 7.36 (d, 2.5) 103.9  
5   162.2 5-OCH3
6 6.88 (d, 2.5) 110.7 H-4
6a   152.1  
8 6.03 (s) 94.1  
9   141.9 9-OCH3
9a   130.7  
5-OCH3 3.96 (3H, S) 56.7  
8-OCH3    
9-OCH3 4.13 (3H,s) 60.0  
  1. aUnless stated otherwise, each proton signal was integrated as one proton.