19F-NMR spectra of 3-O-(β-D-galactopyranosyl)-α4, α5-di-O-(β-D-glucopyranosyl)-6-fluoropyridoxol 12 (5.1 mg, 7.5 mmol) with stably transfected MCF7-lacZ cells (5×106) in PBS (0.1M, pH=7.4, 600 μL) at 37 °C. Spectra acquired in 51 s and enhanced with an exponential line broadening = 100 Hz. (DUFPOL: α4, α5-di-O-(β-D-glucopyranosyl)-6-fluoropyridoxol).