8β-Acetoxy-14α-benzoyloxy-N-ethyl-3α,10β,13β,15α-tetrahydroxy-1α,6α,16β-trimethoxy-4β-(methoxymethylene)aconitane: aconifine from Aconitum karakolicum Rapaics

The title compound, C34H47NO12, is the norditerpenoid alkaloid aconifine isolated from the leaves and tubers of Aconitum karakolicum Rapaics. It has a lycoctonine carbon skeleton and contains four six-membered rings and two five-membered rings; its geometry is similar to that observed in other lycoctonine-type diterpenoid alkaloids. There are two intramolecular O—H...O hydrogen bonds which close five- and seven-membered pseudo-rings, respectively. In the crystal, two intermolecular O—H...O hydrogen bonds cross-link the molecules into double chains along the a axis.

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