Chemical shift δ (ppm)

L-Arginine maleate dihydrate

L-Arginine

Maleic acid

Group identification

6.285

-

6.285

-CH-

3.717

3.27

-

-CH-

3.201

3.21

-

-CH₂-

1.889

1.63

-

-CH₂-

1.629

1.63

-

-CH₂-