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Updated: Oct 20, 2025

Quantitative Structure-Activity Relationship, Activity Prediction, and Molecular Dynamics of Non-nucleotide Reverse Transcriptase Inhibitors
Published on: May 9, 2025
Utilization of Metabolite Identification and Structural Data to Guide Design of Low-Dose IDO1 Inhibitors
Brett Hopkins1, Hongjun Zhang1, Indu Bharathan1
1Departments of Discovery Chemistry, Pharmacokinetics, Pharmacodynamics, and Drug Metabolism, Computational and Structural Chemistry, Discovery Process Chemistry, and Pharmacology, Merck & Co., Inc., 33 Avenue Louis Pasteur, Boston, Massachusetts 02115, United States.
Abstract:
Herein the discovery of potent IDO1 inhibitors with low predicted human dose is discussed. Metabolite identification (MetID) and structural data were used to strategically incorporate cyclopropane rings into this tetrahydronaphthyridine series of IDO1 inhibitors to improve their metabolic stability and potency. Enabling synthetic chemistry was developed to construct these unique fused cyclopropyl compounds, leading to inhibitors with improved pharmacokinetics and human whole blood potency and a predicted human oral dose as low as 9 mg once daily (QD).
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