... (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 ... và 0.86 (2x3H, d, Me-26, Me-2 7), 0. 93 (3H, d, Me-2 1), 3. 52 (1H, m, H- 3) , 5 .35 (1H, d, H- 6), δst = 5.02 (dd, J=8.6 & 15.1 Hz, H-2 2) và 5.15 (dd, J=8.6 & 15.1 Hz, H-2 3) . Phổ 13 C -...