3.3.2. Compound **7**

Colorless gum (1.5 mg, 4%); UV (MeOH) λmax (log ε) 239 (3.72), 276 (3.00), 328 (2.83) nm; IR (UATR) νmax 3413, 2986, 1756, 1718, 1279, 1198, 1170, 1078, 1025, 973, 712 cm<sup>−</sup>1; δ<sup>H</sup> 1.40 (6H, d, *J* = 6.9 Hz, H-17), 3.22 (1H, sept, *J* = 6.9 Hz, H-16), 3.72 (3H, s, 12-OMe), 3.76 (3H, s, 13-OMe), 3.84 (1H, s, 7-OMe), 3.96 (3H, s, 6-OMe), 4.53 (1H, s, H-9), 6.78 (1H, dd, *J* = 8.5, 2.2 Hz, H-15), 6.83 (1H, d, *J* = 8.5 Hz, H-14), 6.91 (1H, d, *J* = 2.2 Hz, H-11), 7.21 (1H, s, H-5), 7.44 (1H, s, H-4), 7.37 (1H, s, H-8); 13C NMR (200 MHz, CD3OD) δ<sup>C</sup> 23.2 (2C, C-17), 36.6 (C-16), 41.7 (C-9), 56.31 (6-OMe), 56.33 (7-OMe), 56.4 (12-OMe), 56.5 (13-OMe), 105.4 (C-8), 106.5 (C-5), 113.1 (C-14), 113.4 (C-11), 115.3 (C-4), 121.8 (C-15), 123.0 (C-8a), 133.7 (C-10), 136.2 (C-4a), 149.0 (C-13), 159.3 (C-3), 151.0 (C-12), 151.8 (C-7), 154.4 (C-6), 158.7 (C-1); (+)-LRESIMS *m*/*z* (rel. int.) 382 (100) [M + H]+; (+)-HRESIMS *m*/*z* 382.2024 [M + H]<sup>+</sup> (calcd for C23H28NO4, 382.2013).

#### 3.3.3. Compound **8**

Colorless gum (1.3 mg, 4%); UV (MeOH) λmax (log ε) 241 (3.90), 326 (2.94) nm; IR (UATR) νmax 3456, 2981, 1745, 1705, 1279, 1199, 1167, 1079, 1026, 978, 712 cm<sup>−</sup>1; 1H NMR (800 MHz, CD3OD) δ<sup>H</sup> 3.72 (3H, s, 13-OMe), 3.84 (3H, s, 7-OMe), 3.96 (3H, s, 6-OMe), 4.52 (2H, s, H-9), 7.15 (2H, m, H-11, H-15), 7.26 (1H, s, H-5), 7.39 (1H, s, H-8), 6.81 (2H, m, H-12, H-14), 7.58 (1H, d, *J* = 5.7 Hz, H-4), 8.20 (1H, d, *J* = 5.7 Hz, H-3); 13C NMR (200 MHz, CD3OD) δ<sup>C</sup> 41.6 (C-9), 55.6 (13-OMe), 56.3 (7-OMe), 56.5 (6-OMe), 105.6 (C-8), 106.6 (C-5), 120.5 (C-4), 124.2 (C-8a), 130.4 (2C, C-11, C-15), 115.0 (2C, C-12, C-14), 135.5 (C-4a), 132.7 (C-10), 140.5 (C-3), 151.7 (C-7), 154.6 (C-6), 159.7 (C-1), 159.3 (C-13); (+)-LRESIMS *m*/*z* (rel. int.) 310 (100) [M + H]+; (+)-HRESIMS *m*/*z* 310.1436 [M + H]<sup>+</sup> (calcd for C19H20NO3, 310.1438).
