... & 15. 1 Hz, H-2 2) và 5. 15 (dd, J=8.6 & 15. 1 Hz, H-2 3). Phổ 13C - NMR: δ (ppm ): 140.8 (C- 5) , 121.72 (C- 6), 71.89 (C- 3), 56 .81 /56 .91 (C-1 4), 56 .12 /56 .02 (C-1 7), 50 .20 (C- 9), 45. 90 /51 .26 ... 45. 90 /51 .26 (C-2 4), 42.26/42.34 (C-4,C-1 3), 39.72/39.82 (C-1 2), 37.30 (C- 1), 36 .54 (C-1 0), 36.17/40.47 (C-2 0), 34.00/138.31 (C-2 2), 31. 95 (C- 8), 31. 95 si (C- 7), 31. 95 st (C-7, C-2 5) , 31.70 (C- 2), 29.23si ... 29.23si (C-2 5) , 28.26/28.91 (C-1 6), 26.18/129.34 (C-2 3), 24.39/24.33 (C-1 5) , 23.12/ 25. 41 (C-2 8), 21.12si (C-1 1), 21.12st (C-11, C-2 1), 19.07/19.00 (C-2 7), 19.41 (C-1 9), 19.82/21.23 (C-2 6), 18.80si...