Amino acids
L-Pyroglutamic acid ,Theanine
Ac-Glutamic acid ,Ac-Tyrosine
DL-Leucine,DL-Threonine ,DL-Valine,

D-Valine, D-Histine, D-Pyroglutamic acid

D-Tyrosine, D-Leucine, D-Glutamic acid
Amino Esters,Alcohols 
Pyr-OMe,Pyr-OEt ,H-Glu(OBzl) Glu(ome), Glu(oet), Asp(OBzl)
D-Trp.OMe.Hcl,L-Pyroglutaminol 
Amino acid Amides 

L-Prolinamide, D-Glutamine

Amino Esters,Alcohols 
L-Pyroglutamic acid methyl ester/ L-Pyroglutamic acid ethyl ester Glu (OBzl), Asp (OBzl), Glu (OMe), Glu (OEt),D-Trp.OMe.HCl,

Amino acid Amides 

L-Prolinamide, D-Glutamine

Compound Salt
L-Arg.L-Pyr,L-Arg.L-Asp
L-Lys.L-Glu .

Intermediates 
Lacosamide,Pidotimod