N-desmethyl-loperamide

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Increased Permeability-Glycoprotein Inhibition at the Human Blood–Brain Barrier Can Be Safely Achieved by Performing PET During Peak Plasma Concentrations of Tariquidar
William C. Kreisl, Ritwik Bhatia, Cheryl L. Morse, Alicia E. Woock, Sami S. Zoghbi, H. Umesha Shetty, Victor W. Pike and Robert B. Innis

Journal of Nuclear Medicine January 1, 2015, 56 (1) 82-87; DOI: https://doi.org/10.2967/jnumed.114.146894