3.50 (m, 2H), 3.58 (t, 2H, J = 6.54), 3.64 (m, 2H), 3.70 (t, 2H, J = 6.54), 3.80 (m, 2H), 3.90 (s, 6H), 4.00 (m, 2H), 6.38 (m, 1H), 6.68 (m, 1H), 6.82 - 6.90 (m, 2H), 7.20 (m, 1H), 7.46 (m, 1H), 7.58 - 7.68 (m, 4H), 7.72 (m, 1H), 7.78 - 8.44 (m, 5H), 8.70 - 8.90 (m, 2H), 14.18 (broad, 2H) ppm