Chemical Name: Monocalcium mono((S)-4-(4-((((S)-2-amino-5-formyl-4-oxo-1,4,5,6,7,8-hexahydropteridin-6-yl)methyl)amino)benzamido)-4-(carboxy-13C)butanoate-1,2,3,4-13C4)
Smiles: O=C1C2=C(NC[C@H](CNC3=CC=C(C(N[13C@H]([13C](O)=O)[13CH2][13CH2][13C]([O-])=O)=O)C=C3)N2C=O)NC(N)=N1.[Ca+2]