| http://www.w3.org/ns/prov#value | - C. (dec). .sup.1 H NMR (DMSO-d-6) 10.3 (s, 1H, NH), 7.37 (m, 1H, benzene), 7.10 (m including s, 3H, aromatic and H-3 or H-6), 6.82 (s, 1H, H-3 or H-6), 2.63 (s, 3H, CH.sub.3), 2.53 (s, 3H, CH.sub.3) IR (KBr): 3400, 3050, 2800, 1625, 1600, 1540, 1480, 1430, 1325,
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