Structure Analysis of Effective Chemical Compounds against Dengue Viruses Isolated from Isatis tinctoria

Table 2

¹H and ¹³C NMR data of compound GB-7 in DMSO-d₆ (δ, ppm; J, Hz).

Positions	^1H NMR	^13C NMR
2		172.7 (C)
3	3.93 (2H, d, J = 14.7)	42.5 (CH2)
4		75.2 (C)
5	7.21 (1H, d, J = 7.6)	131.0 (CH)
6	6.60 (1H, br.d, J = 7.6)	105.8 (CH)
7		157.7 (C)
8	6.65 (1H, br.s)	103.8 (CH)
9		118.6 (C)
10		145.5 (C)
O-Me	3.68 (3H, s)	55.4 (CH3)
COOH		180.6 (C)