Folic Acid Impurity 1

Chemical Name: (S)-3-(4-(((6-amino-8-oxo-5,8-dihydropyrido[2,3-b]pyrazin-2-yl)methyl)amino)benzamido)-4-((2,6-diamino-4-oxo-1,4-dihydropyrimidin-5-yl)amino)-4-oxobutanoic acid

Smile: O=C(N[C@]([H])(C(NC1=C(N)NC(N)=NC1=O)=O)CC(O)=O)C(C=C2)=CC=C2NCC3=NC4=C(N=C3)NC(N)=CC4=O