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1H NMR
(400 MHz, DMSO) ¦Ä = 11.12 (s, 1H), 10.72 (s, 1H), 9.31 (d, J = 9.5 Hz, 1H), 8.62 (d,
J = 9.5 Hz, 1H), 8.52 ¨C 8.43 (m, 1H), 8.34 ¨C 8.21 (m, 3H), 8.00 (d, J = 8.8 Hz, 1H),
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