FT-IR and 1H NMR techniques revealed the occurrence of esterification reaction between the hydroxyl group of SP and the γ-carboxyl group of FA that confirming the SP-FA conjugation. 
FT-IR
FT-IR and 1H NMR techniques revealed the occurrence of esterification reaction between the hydroxyl group of SP and the γ-carboxyl group of FA that confirming the SP-FA conjugation. 
1H NMR