4ZYY:
reference: Structural and Enzymatic Analysis of Tumor-Targeted Antifolates That Inhibit Glycinamide Ribonucleotide Formyltransferase., Deis SM, Doshi A, Hou Z, Matherly LH, Gangjee A, Dann CE 3rd, Biochemistry. 2016 Aug 16;55(32):4574-82. doi: 10.1021/acs.biochem.6b00412. Epub , 2016 Aug 3. PMID: 27439469

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