... of 12 6 3b 3 31. 75 70% 11 4.5 – 11 5.4 3c 315 .30 60% 11 8.4 – 12 0.0 15 04, 13 18 3d 317 .72 74% 15 5 .1 – 15 7.0 15 06, 13 19 3e 380 .17 80% 16 0.7 – 16 2.3 3f 373.36 53% 15 2.3 – 15 4 .1 14 81, 13 22 3g 380 .17 74% ... 13 0.58, 12 8.96, 12 8.82, (s,1H) 12 8.66, 12 6.50, 12 2.80, 11 3.77, 11 2. 21, 74. 81 4d 9.58 (s, 1H, -CHO), 7.37 (s, 1H), 18 9.65, 16 4.48, 15 6.70, 14 1. 01, 13 9.28, 7.36-7.27 (m, 5H), 7 .17 (d, 1H, J= 13 1.02, 13 0.58, ... (s, 1H), 6.97 (m, 3H), 13 7.02, 13 5 .18 , 13 1. 81, 13 0.94, 6. 61 (td, J=8Hz and J=4Hz, 1H), 6.38 11 8.36, 11 8 .13 , 11 5.62, 11 5.38, (s, 1H), 3.79 (s, 3H, CH3) 11 0.34, 10 2. 31, 73.06, 55.69 8.04 (s, 1H),...