A Structure Analysis of Pieristoxin G by the X-Ray Diffraction Method

Abstract

The stereochemistry of pieristoxin G, C₂₀H₃₂O₈, has been established by the X-ray diffraction method. The compound crystallized in the space group P2₁2₁2₁, with a=13.668, b=6.567, and c=21.516 A. The structure was solved by the direct method and refined to R=0.050 for 1409 reflections. The conformations of the rings A, C, and D are envelope, distorted chair, and half-chair respectively. The junctions of the rings of A/B, B/C, and C/D are trans, cis, and cis respectively.