*3.1. Chemistry Section*

General Information. Reagents and solvents were purchased from commercial suppliers (Sigma-Aldrich, Acros) and used as received. GC-MS: *Agilent 7890A* gas chromatograph equipped with a quadrupole mass spectrometer *Agilent 5975C* as a detector; quartz column HP-5MS (copolymer 5%–diphenyl–95%–dimethylsiloxane) of length 30 m, internal diameter 0.25 mm and stationary phase film thickness 0.25 µm. Optical rotation: polAAr 3005 spectrometer. <sup>1</sup>H and <sup>13</sup>C NMR: *Bruker DRX-500* apparatus at 500.13 MHz (1H) and 125.76 MHz (13C) and *Bruker Avance—III 600* apparatus at 600.30 MHz (1H) and 150.95 MHz (13C), *J* in Hz; structure determinations by analyzing the <sup>1</sup>H NMR spectra, including <sup>1</sup>H–1H double resonance spectra and <sup>1</sup>H–1H 2D homonuclear correlation, *J*-modulated <sup>13</sup>C NMR spectra (JMOD), and <sup>13</sup>C–1H 2D heteronuclear correlation with one-bond (C–H COSY, <sup>1</sup> *J*(C,H) = 160 Hz, HSQC, <sup>1</sup> *J*(C,H) = 145 Hz) and long-range spin-spin coupling constants (COLOC, 2,3*J*(C,H) = 10 Hz, HMBC, 2,3*J*(C,H) = 7 Hz). HR-MS: DFS Thermo Scientific spectrometer in a full scan mode (15–500 m/z, 70 eV electron impact ionization, direct sample administration).

Spectral and analytical investigations were carried out at the Multi-Access Chemical Research Center of Siberian Branch of Russian Academy of Sciences. All product yields are given for pure compounds purified by recrystallization from ethanol or isolated by column chromatography (SiO2; 60–200 µ; *Macherey-Nagel*). The purity of the target compounds was determined by GC-MS methods. All of the target compounds reported in this paper have purities of no less than 95%.
