molecular structure of methyl 20-ISOPROPYL- 15(<i>E</i>)-hydroxyimino-5,9-DImethyl-18-oxahexacyclo [12.4.0.2<sup>2,13</sup>.1<sup>18,20</sup>.0<sup>5,10</sup>.0<sup>4,13</sup>]HENEICOSANE-9-carboxylate
Methyl 20-isopropyl-15(<i>E</i>)-hydroxyimino-5,9-dimethyl-18-oxahexacyclo [12.4.0.2<sup>2,13</sup>.1<sup>18,20</sup>.0<sup>5,10</sup>.0<sup>4,13</sup>]-heneicosane-9-carboxylate is synthesized and its molecular structure is determined. Compound IIа of С<sub>27</sub>H<sub>41</sub>NO<sub>4</sub> crystallizes in the acentric <i>P</i>2<sub>1</sub> space group with the following unit cell parameters: <i>а</i> = 7.6511(7) Å, <i>b</i> = 12.0698(11) Å, <i>c</i> = 12.9182(12) Å, β = 95.257(2)°.