3.3.1. Compound **1**

The Hookerianine A (**1**): White amorphous powder. [*α*] 14 <sup>D</sup> = +21.2 (*c* = 0.565, CH2Cl2). UV (CHCl3) λmax (log *ε*) 242.0 (0.25) nm. IR (KBr) *υ*max: 3294, 3029, 2929, 2865, 2761, 1637, 1539, 1496, 760 cm−1. 1H- and 13C-NMR data are shown in Table 1. HR-ESI-MS *m*/*z* 465.3833 ([M + H]+, C31H49N2O+; calc. 465.3839).

#### 3.3.2. Compound **2**

Hookerianine B (**2**): White amorphous powder. [*α*] 14 <sup>D</sup> = +21.2 = +3.7 (c = 0.092, CH2Cl2). UV (CHCl3) λmax (log *ε*) 244.5 (1.53). IR (KBr) *υ*max: 3402, 3032, 2930, 2853, 2767, 1644, 1603, 1521, 1488, 718, 694 cm−1. 1H- and 13C-NMR data are shown in Table 1. HR-ESI-MS *m*/*z* 465.3471 ([M + H] +, C30H45N2O2 +; calc. 465.3476).
