“…4H),1H),1H),3.96 (dd,J = 9.2,4.8 Hz,1H),3.04 (dd,J = 18.8,9.6 Hz,1H),2.94 (s,3H),2.73 (dd,J = 18.8,3.6 Hz, 1H); 13 C NMR (100 MHz, CDCl 3 /CD 3 OD 10 : 1 v/v) δ 178. 3, 176.4, 159.3, 153.5, 140.1, 134.4, 133.5, 129.8, 128.9, 128.4 (two carbon overlap), 128.1, 42.1, 36.9, 25.0;IR (KBr) υ 3383, 2942, 2831, 1776, 1698, 1595, 1544, 1492, 1437, 1383, 1337, 1281, 1119, 1026 3,179.1,160.3,159.9,142.0,138.0,137.3,134.6,134.4,133.7,131.9,131.8,130.0,129.9,128.8,128.2 (q,127.4,127.3,124.8 (q, J C-F = 271.5 Hz), 38.6, 25.0 (two carbon overlap); IR (KBr) υ 3466, 3071, 3004, 2953, 2364, 2345, 1775, 1694, 1641, 1606, 1557, 1516, 1474, 1360, 1223, 1165, 1061, 989, 862, 838, (400 MHz, CD 3 OD) δ 8.35 (dd, J = 7.8, 1. 5 Hz,1H), 8.14-8.12 (m, 1H), 7.96-7.88 (m, 2H), 7.51-7.43 (m, 2H), 7.51-7.39 (m, 2H), 4.22 (dd,...…”