7.13 (1H, d, J=2.4 Hz), 7.26 (1H, d, J=8.8 Hz), 7.92 (1H, br s). MS m/z: 274 (M+). Anal. Calcd for
C H N O : C, 65.67; H, 6.61; N, 10.21. Found: C, 65.43; H, 6.56; N, 10.21.
15 18 2 3
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