3.2.2. Compound **3**

Colorless gum (1.9 mg, 4%); UV (MeOH) λmax (log ε) 240 (4.24), 283 (3.47), 324 (3.20) nm; IR (UATR) νmax 3440, 2982, 1746, 1709, 1278, 1199, 1168, 1078, 1026, 975, 712 cm−1; For NMR data see Table 1; (+)-LRESIMS *m*/*z* (rel. int.) 408 (100) [M + H]+; (+)-HRESIMS *m*/*z* 408.1422 [M + H]<sup>+</sup> (calcd for C21H21F3NO4, 408.1417).

## 3.2.3. Compound **4**

Colorless gum (2.7 mg, 7%); UV (MeOH) λmax (log ε) 240 (4.08), 276 (3.35), 327 (3.17) nm; IR (UATR) νmax 3400, 2981, 1747, 1705, 1278, 1200, 1164, 1078, 975, 712 cm−1; 1H NMR (800 MHz, CD3OD) δ<sup>H</sup> 2.17 (3H, t, *J* = 18.8 Hz, H-17), 3.74 (3H, s, 12-OMe), 3.75 (3H, s, 13-OMe), 3.87 (3H, s, 7-OMe), 3.97 (3H, s, 6-OMe), 4.56 (2H, s, H-9), 6.77 (1H, dd, *J* = 8.2, 2.0 Hz, H-15), 6.83 (1H, d, *J* = 8.2 Hz, H-14), 6.92 (1H, d, *J* = 2.0 Hz, H-11), 7.51 (1H, s, H-5), 7.53 (1H, s, H-8), 8.42 (1H, s, H-3); 13C NMR (200 MHz, CD3OD) δ<sup>C</sup> 25.5 (t, <sup>2</sup>*J*CF = 28.6 Hz, C-17), 42.4 (C-9), 56.36 (12-OMe), 56.38 (13-OMe), 56.41 (7-OMe), 56.5 (6-OMe), 104.4 (C-5), 106.4 (C-8), 113.2 (C-14), 113.6 (C-11), 122.0 (C-15), 124.0 (t, <sup>1</sup>*J*CF = 238.3 Hz, C-16), 124.6 (C-8a), 126.8 (t, <sup>2</sup>*J*CF = 25.3 Hz, C-4), 131.2 (C-4a), 133.1 (C-10), 138.1 (t, <sup>3</sup>*J*CF = 9.3 Hz, C-3), 149.3 (C-13), 150.6 (C-12), 151.6 (C-7), 154.8 (C-6), 162.1 (C-1); (+)-LRESIMS *m*/*z* (rel. int.) 404 (100) [M + H]+; (+)-HRESIMS *m*/*z* 426.1481 [M + Na]<sup>+</sup> (calcd for C22H23F2NO4Na, 426.1487).
