“…[ α ]$\rm{_{D}^{20}}$ =9.1° ( c =0.98, CHCl 3 ); 1 H NMR (CD 2 Cl 2 , 300 MHz): δ =4.06 (dd, J =2.6, 11.7 Hz, 1 H), 3.94 (dt, J =2.7, 11.9 Hz, 1 H), 3.84 (m, 1 H), 2.51 (q, J =7.2 Hz, 2 H), 1.62 (m, 1 H), 1.41 (s, 3 H), 1.34 (m, 1 H), 1.30 (s, 3 H), 1.11 (s, 3 H), 1.06 (s, 3 H), 0.98 (t, J =7.2 Hz, 3 H); 13 C NMR (CD 2 Cl 2 , 75 MHz): δ =215.2, 98.6, 74.3, 60.2, 50.9, 31.7, 29.9, 25.7, 21.3, 19.1, 19.0, 8.1; MS (EI): m / z (%): 215 (1), 199 (13), 156 (17), 139 (13), 127 (5), 115 (30), 99 (10), 83 (44), 71 (7), 57 (100), 43 (51), 29 (31), 55 (15); IR: ν =2975, 2939, 2877, 1706, 1467, 1381, 1372, 1273, 1198, 1105, 971, 855, 764 cm −1 ; HR‐MS (C 12 H 22 O 3 ): calcd 215.1647, found 215.1646. The analytical data are in agreement with those previously reported in the literature 51, 68…”