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UV/vis-HPLC trace (λ = 240 nm) for analytical separation of BS148. Chiralpak IA (4.6 mm × 1 cm, 5 μm), n-Hex/MTBE/DEA 85:15:0.1. Flow rate:1 mL/min; 25 °C; injection volume: 10 μL. UV/vis-HPLC and ECD-HPLC trace with λ = 240 nm. (R/S)-BS148: k1 = 0.68; k2 = 1.00; α = 1.42; RS = 2.20. Chromatogram and ECD trace of (R/S)-BS148 are reported on the top, and chromatogram and ECD trace of (+)-(R)-BS148 are reported on the bottom.
