... (C-1 5), 23 . 12/ 25.41 (C -2 8), 21 . 12 si (C-1 1), 21 . 12 st (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 (C -2 1), 12. 00/ 12. 24 (C -2 9), 11.88/ 12. 07 (C-1 8). Ghi ch : ... (C-1 0), 36.17/40.47 (C -2 0), 34.00/138.31 (C -2 2) , 31.95 (C- 8), 31.95si (C- 7), 31.95st (C-7, C -2 5), 31.70 (C- 2) , 29 .23 si (C -2 5), 28 .26 /28 .91 (C-1 6), 26 .18/ 129 .34 (C -2 3), 24 .39 /24 .33 (C-1 5), ... - 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 (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...