Small molecules & peptides

EKAP standard

Reference standard for [¹¹C]EKAP

[¹¹C]EKAP standard

Methyl (R)-4-(2-(3,4-dichlorophenyl)acetyl)-3-((diethylamino)methyl)piperazine-1-carboxylate


Research Chemical


Molar mass 416.34

CAS RN [not yet assigned]

Purity ≥ 95 %

  • Colorless to yellow oil
  • soluble in dichloromethane, ethyl acetate, dimethyl sulfoxide


CoA: ¹H NMR spectrum (identity), HPLC (purity), chiral HPLC (chiral purity)


Naganawa M. et al. Kinetic modeling and test-​retest reproducibility of ¹¹C-​EKAP and ¹¹C-​FEKAP, novel agonist radiotracers for PET imaging of the κ-​opioid receptor in humans. J. Nucl. Med. 2020, 61, 1636–1643.

Li S. et al. Development and In Vivo Evaluation of a κ-Opioid Receptor Agonist as a PET Radiotracer with Superior Imaging Characteristics. J. Nucl. Med. 2019, 60, 1023–1030.

Matuskey D. et al. Social status and demographic effects of the kappa opioid receptor: a PET imaging study with a novel agonist radiotracer in healthy volunteers. Neuropsychopharmacology 2019, 44, 1714–1719.

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