[2+2] Cycloaddition, isobutyraldehyde, propionyl chloride, (3R,4S)-4-isopropyl-3-methyloxetan-2-one, (8α,9R)-6′-Methoxy-9-[(trimethylsilyl)oxy]cinchonan, Quinine Derivative by Anna-Lena Hartmann | Sep 26, 2022