ng with methanol/dichloromethane to afford the title compound as a white foam, 15 mg, 7%. 1H NMR (CDCl3) δ 9.52 (s, 1H), 8.38 (d, J = 6.1 Hz, 1H), 7.62 (d, J = 8.1 Hz, 1H), 7.40 (dd, J = 8.1, 3.8 H