X
R
H-4
H-5
H-6
H-7
CH
3
CO
Solvent
O
H
7.50d
7.07t
7.60t
6.92d
-
DMSO-d6
O
Me
7.59d
7.12t
7.61t
6.91t
-
DMSO-d6
O
Ac
7.27d
7.33t
7.70t
8.38d
2.73s
DMSO-d6
C(CN)
2
H
7.87d
7.12t
7.59t
6.94d
-
DMSO-d6
Table 2:
NMR data of isatin is presented [32].