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The title compound, C24H39NO6 [systematic name: (1α,6α,14α,16β)-N-ethyl-6,16-dimethoxy-4-methoxymethylaconitane-1,8,14-triol], is a C19-diterpenoid alkaloid from the roots of Aconitum flavum Hand. The molecule has an aconitane carbon skeleton with four six-membered rings and two five-membered rings. Both five-membered rings adopt envelope conformations. Two six-membered rings adopt chair conformations, whereas the other two adopt boat conformations. Intramolecular O—H...O and O—H...N and intermolecular O—H...O hydrogen bonds are present in the structure. In the crystal, one methyl group is disordered over two sites with an occupancy ratio of 0.70 (3):0.30 (3).