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ochre to brown crystalline powder and chunks
173 °C / 4mmHg
Prediction： 1H NMR (CDCl3) delta 7.30 (t, IH, J= 7.66, 6.96 Hz, Ar), 7.61-7.90 (m, 4H, Ar), 8.54 (d, IH, J= 5.84 Hz, Ar), 8.75 (d, IH5 J= 8.78 Hz3 Ar).