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Table 1 H-1-NMR and C-13-NMR resonances of compound 1 compared to solamargine

From: Solamargine, a bioactive steroidal alkaloid isolated from Solanum aculeastrum induces non-selective cytotoxicity and P-glycoprotein inhibition

   Solamargine (19) (deuterated chloroform and methanol) Compound 1 (2015) (deuterated methanol)
  Carbon no (type) C13-NMR H-1-NMR (J in Hz) C13-NMR H-1-NMR (J in Hz)
Aglycone C-1 (CH2) 37.9   38.70  
C-2 (CH2) 30.5   31.13  
C-3 (CH) 79   79.50  
C-4 (CH2) 40.4   41.19  
C-5 (C) 141.1   142.07  
C-6 (CH) 122.2 5.37 (d, J 4.2) 122.78 5.38 (d, J 4.6)
C-7 (CH2) 32.5   32.94  
C-8 (CH) 32.1   31.81  
C-9 (CH) 50.7   51.90  
C-10 (C) 37.5   38.20  
C-11 (CH2) 21.4   22.15  
C-12 (CH2) 38.9   39.67  
C-13 (C) 41.1   41.77  
C-14 (CH) 57.1   57.90  
C-15 (CH2) 30.1   30.90  
C-16 (CH) 79.7 4.33 (m) 80.45 4.34 (m)
C-17 (CH) 63.2   64.21  
C-18 (CH3) 16.8 0.84 (s) 17.00 0.83 (s)
C-19 (CH3) 19.6 1.05 (s) 19.91 1.05 (s)
C-20 (CH) 42   42.85  
C-21 (CH3) 15.4 0.97 (d, J 7.0) 15.60 0.97 (d, J 7.2)
C-22 (C) 98.9   99.60  
C-23 (CH2) 34.4   33.36  
C-24 (CH2) 32.7   33.14  
C-25 (CH) 31.3   31.81  
C-26 (CH2) 47.8 2.6 (m, br) 48.47 2.53 (m)
C-27 (CH3) 19.6 0.87 (d, J 6.0) 19.98 0.85 (d, J 6.4)
Glucose (glu) C-1′ (CH) 99.9 4.48 (d, J 7.8) 100.63 4.50 (d, J 7.6)
C-2′ (CH) 79.5   80.23  
C-3’(CH) 77.3   78.19  
C-4′ (CH) 75.7   76.73  
C-5′ (CH) 78.6   79.50  
C-6′ (CH2) 61.4   62.12  
Rhamnose A (rha A) C-1″ (CH) 102.4 4.87 (s) 103.16 4.84 (s)
C-2″ (CH) 71.8   72.60  
C-3″ (CH) 71.5   72.35  
C-4″ (CH) 73.3   74.10  
C-5″ (CH) 69.1   69.94  
C-6″ (CH3) 17.7 1.29 (m) 18.11 1.26 (m)
Rhamnose B (rha B) C-1″‘(CH) 101.5 5.23 (s) 102.44 5.21 (s)
C-2″‘(CH) 71.6   72.52  
C-3″‘(CH) 71.3   72.35  
C-4″‘(CH) 73   73.89  
C-5″‘(CH) 70.1   70.85  
C-6″‘(CH3) 17.6 1.29 (m) 18.0. 1.26 (m)