The remaining residue was diluted with 10 mL n-hexane, filtered through a Millipore 0.45 mm membrane, and then the filtrate was injected into an HPLC (PU-1580; JASCO) with a fluorescence detector (FP-1520; JASCO).
The remaining residue was diluted with 10 mL n-hexane, filtered through a Millipore 0.45 mm membrane, and then the filtrate was injected into an HPLC (PU-1580; JASCO) with a fluorescence detector (FP-1520; JASCO).