“…1 H and13 C NMR Spectral Data (δ in ppm) for 11, 13 and 1411 a,c 13 b,d 14 a,d 14 b,d no. δ H (J, Hz) δ C δ H (J, Hz) δ C δ H (J, Hz) δ C δ H (J, Hz) δ C 1 171.0, C 169.3, C 2 161.9, C 160.7, C 3 134.9, C 134.7, C 7.81, brs 124.2, CH 7.57, s 121.5, CH 4 145.7, C 150.6, C 142.2, C 140.6, C 4a 120.6, C 119.6, C 130.5, C 128.8, C 5 7.28, dd (8.2, 0.9) 113.5, CH 7.33, dd (7.9, 1.6) 113.6, CH 148.2, C 146.6, C 6 7.05, t-like (8.0) 123.9, CH 7.07, t (7.9) 122.7, CH 7.00, d (6.5) 113.4, CH 6.97, d (7.4) 112.1, CH 7 6.86, dd (7.8, 0.9) 112.9, CH 7.02, dd (7.9, 1.6) 116.7, CH 7.17, t-like (7.6) 124.5, CH 7.06, t-like (7.9) 122.0, CH 8 145.3, C 145.8, C 7.72, d (8.3) 115.5, CH 7.58, d (8.2) 114.4, CH 8a 122.9, C 126.1, C 125.5, C 124.2, C a In MeOH-d 4 .…”