 (**0**) {#s0000}  Colorless crystal, 00 mg; ${\lbrack\alpha\rbrack}_{D}^{00}$ + 00.0° (*c* 0.0, MeOH); IR (film) *ν*~max~ 0000, 0000, 0000, 0000, 0000, 0000, 0000, 0000, 000 cm^---0^; HR-ESI-MS *m/z* 000.0000 (\[M---H\]^---^, Calcd. for C~00~H~00~O~0~, 000.0000).  ### 0.0.0. Angustanol (**0**) {#s0000}  Colorless amorphous powder, 00 mg; ${\lbrack\alpha\rbrack}_{D}^{00}$ + 0.0° (*c* 0.0, acetone); IR (film) *ν*~max~ 0000, 0000, 0000, 0000, 0000, 0000, 0000, 0000, 0000, 0000 cm^---0^; HR-ESI-MS *m/z* 000.0000 (\[M+H\]^+^, Calcd. for C~00~H~00~O~0~, 000.0000).  ### 0.0.0. Angustanoic acid 