*3.7. Planar Structure Characterization*

Compound **1**: white solid, [α] 26 <sup>D</sup> +17.7 (*c* 0.1, MeOH); UV/Vis (Figure S31); IR (Figure S32). NMR data Table S13; 1H, 13C, COSY, HSQC, HMBC, HSQC-TOCSY, and long-range HSQMBC spectra (Figures S33–S39); HR ESIMS (observed *m*/*z* [M + Na]<sup>+</sup> at 479.2877, C27H40N2O4, calculated 479.2880).
