Crystal structure of (+)-(1S,5S,6S,7S,10S,11S,16S)-16-hvdroxy-7-(methoxymethoxy)-11,15,18,18-tetrametnyl-3,13-dioxo-2,4-dioxatetracyclo-[12.3.1.01,5.06,11]octadec-14-en-10-yl benzoate

In the fused tetracyclic system of the title compound, C29H36O9, the five-membered dioxolane ring adopts a twist conformation; the two adjacent C atoms deviate alternately fromthe mean plane of the other three atoms by A -0.252 (6) and 0.340 (6) angstrom. The cyclohexane, cyclohexene and central cyclooctane rings show chair, half-chair and boat-chair forms, respectively. There are three intramolecular C-H center dot center dot center dot O interactions supporting the molecular conformation, with one S(6) and two S(7) graph-set motifs. In the crystal, intermolecular O-H center dot center dot center dot O hydrogen bonds connect the molecules into a helical chain running along the c-axis direction, generating a C(7) graph-set motif. The chains are further linked by intermolecular C-H center dot center dot center dot O interactions to construct a three-dimensional network. There is no valid C-H center dot center dot center dot pi interaction.

Automated summary

The title compound C29H36O9 features a fused tetracyclic system with complex molecular interactions. In the crystal, a three-dimensional network is constructed through hydrogen bonds and interactions, connecting molecules into helical chains along the c-axis direction. There is no valid C-H center dot center dot center dot pi interaction within the structure.