4RT2:
reference: Two Scaffolds from Two Flips: (alpha,beta)/(beta,gamma) CH2/NH "Met-Im" Analogues of dTTP., Kadina AP, Kashemirov BA, Oertell K, Batra VK, Wilson SH, Goodman MF, McKenna CE, Org Lett. 2015 Jun 5;17(11):2586-9. doi: 10.1021/acs.orglett.5b00799. Epub 2015, May 13. PMID: 25970636

This OCA Structure page
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