Crystal structure of a newly oxidized aristolane sesquiterpenes, C₁₅H₂₂O₃, from aristolochia debilis

Abstract

The strain affecting the molecule is largely due to angular deformation which is partly due to the fusion of the rings and partly due to substitution of H-atoms by methyl groups and oxygen atoms.

Peroxy natural products

“…73,74 A new aristolane, 190, was isolated from Aristolochia debilis and the structure was established by an X-ray crystal study. 151 Tehranolide 191 was a constituent of Artemisia diffusa and represents a new skeletal class containing an eight-membered ring. 152 A biosynthetic sequence was proposed for the formation of the ring system from a eudesmanolide by oxidative cleavage.…”