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Table 1 The NMR data of compound 2c

From: Synthesis and biological evaluation of 1, 3-dihydroxyxanthone mannich base derivatives as anticholinesterase agents

Assignment 13C NMR 1H NMR HSQC HMBC
1 161.70    
2 104.15    
3 165.67    
4 90.09 6.43 (s, 1H) 90.09 157.54, 104.15, 109.21
4a 157.54    
4b 156.21    
5 117.76 7.40 (d, J = 8.4 Hz, 1H) 117.74 121.19, 124.27
6 135.07 7.68 (t, J = 7.9 Hz, 1H) 135.07 126.27, 156.21
7 124.27 7.35 (t, J = 7.5 Hz, 1H) 124.27 117.76, 121.19
8 126.27 8.24 (d, J = 7.9 Hz, 1H) 126.27 180.96, 135.07, 156.21
8a 121.19    
9 180.96    
8b 109.21    
OCH3 56.37 3.92 (s, 3H) 56.37 165.67
CH2N 45.96 3.76 (s, 2H) 45.96 165.67, 161.70,
109.21, 54.24
1' and 4' 54.24 2.63 (brs, 4H) 54.24 23.81
2' and 3' 23.81 1.75 (brs, 4H) 23.81 23.81