750-MHZ DIRECTLY COUPLED HPLC-NMR - APPLICATION TO THE SEQUENTIAL CHARACTERIZATION OF THE POSITIONAL ISOMERS AND ANOMERS OF 2-FLUOROBENZOIC, 3-FLUOROBENZOIC, AND 4-FLUOROBENZOIC ACID GLUCURONIDES IN EQUILIBRIUM MIXTURES - SIDELMANN, UG; GAVAGHAN, C; CARLESS, HAJ; SPRAUL, M; HOFMANN, M; LINDON, JC; WILSON, ID; NICHOLSON, JK (ANALYTICAL CHEMISTRY, 1995)