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Karad, Somnath Narayan, Mohan Pal, Rachel S. Crowley, Thomas E. Prisinzano, and Ryan A. Altman. "Synthesis and Opioid Activity of Tyr(1)–ψ[(Z)CF=CH]–Gly(2) and Tyr(1)–ψ[(S)/(R)-CF(3)CH–NH]–Gly(2) Leu-enkephalin Fluorinated Peptidomimetics." ChemMedChem 2017.

Karad, Somnath Narayan, et al. "Synthesis and Opioid Activity of Tyr(1)–ψ[(Z)CF=CH]–Gly(2) and Tyr(1)–ψ[(S)/(R)-CF(3)CH–NH]–Gly(2) Leu-enkephalin Fluorinated Peptidomimetics." ChemMedChem 2017.