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organic compounds
The crystal structure of 3α-bikhaconine acetone solvate [1α,6α,16β-trimethoxy-4β-(methoxymethyl)aconitane-3α,8β,13β,14α-tetrol acetone solvate, C25H41NO8.C3H6O], a C19 norditerpenoid alkaloid, which has been partially synthesized from indaconitine, contains discrete molecules separated by normal van der Waals distances. The molecular dimensions are normal; the mean bond distances are Csp3—N 1.471 (9), Csp3—Csp3 1.54 (2) and Csp3—O 1.425 (14) Å. The fused-ring system contains two chair, one half-chair, two envelope and one boat conformation. There are both inter- and intramolecular hydrogen bonds, with OO separations in the range 2.655 (3)–3.048 (3) Å and HO interactions in the range 1.92–2.38 Å. There are no interactions between the alkaloid and the solvate molecules.