Figure 4: Hyperpolarized MR probe targeting carboxylesterase.
From: Design of a 15N Molecular Unit to Achieve Long Retention of Hyperpolarized Spin State
(a) Probe 4 for sensing of carboxylesterase actvity. (b) Stacked single-scan 15N NMR spectra of hyperpolarized probe 4 (13.3 mM, every 90 s, 5° pulse angle, 0 min = 90 s after dissolution) after mixing (left) with or (right) without esterase (25 units, derived from porcine liver) in phosphate-buffered saline (H2O, pH 7.4).
