Report - The Royal Society of Chemistry · 3J = 11.5 Hz, 3J = 8.1 Hz, 4J = 1.0 Hz, CH(6)), 5.70 (dd, 1H, 3J = 1.9 Hz, 3J = 1.9 Hz, CH(2))) ppm; 13C-NMR (75 MHz, DMSO- d6): δ = 162.3 (d, 1J

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