The title compound [systematic name: (1S,4S,5R,7S,8S,9R,10R,11S,13S,14S,16S,17R)-N-methyl-8,14-dihy­droxy-1,16-tri­meth­oxy-4-(meth­oxy­methyl­ene)aconitane], C24H39NO5, was isolated from the roots of Aconitum carmichaelii Debx., which is known as ‘Chuanwu’ in Chinese traditional herbal medicine. The mol­ecule has an aconitane carbon skeleton with four six-membered rings and two five-membered rings, including a six-membered N-containing heterocyclic ring. Both five-membered rings adopt envelope conformations. The four six-membered adopt chair conformations. Two intra­molecular O—H⋯O hydrogen bonds occur.

Tourmaline from Altai mine in China's Sinkiang was used to remove lead (II), copper (II) from aqueous solution. The results demonstrate that tourmaline contains Na(Mg,V)3Al6(BO3)3Si6O18(OH)4, NaFe3Al6(BO3)3Si6O18(OH)4. The data show that Tourmaline from Altai mine in China's Sinkiang can be used natural adsorbent for lead (II), copper (II). It is observed that the adsorption data fitted to the Langmuir isotherm. Furthermore, both Pb (II) and Cu (II) absorbed by tourmaline and tourmaline were characterized by X‐ray diffraction, Laser Raman Spectrum, Fourier transform infrared spectroscopy, X‐ray energy dispersive spectrometer, Transmission electron microscopy and Zeta potential.

Key indicators: single-crystal X-ray study; T = 173 K; mean (C-C) = 0.004 Å; R factor = 0.019; wR factor = 0.048; data-to-parameter ratio = 16.4.

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