Ultrasound-assisted extraction of total flavonoids from Aconitum gymnandrum.

Background: Aconitum gymnandrum is a Chinese traditional herb used as carminative and analgesic. In this study, A. gymnandrum was used as an experimental matrix.

1-Chloro-1H-1,2,3-benzotriazole.

The title compound, C6H4ClN3, is essentially planar, with a maximum deviation of 0.007 (3) Å. In the crystal, a short contact of 2.

8β-Acet-oxy-14α-benzo-yloxy-N-methyl-13β,15α-dihy-droxy-1α,6α,16β-trimeth-oxy-4β-(meth-oxy-meth-yl)aconitane: hypaconitine isolated from 'fuzi'.

The title compound, C(33)H(45)NO(10), has an aconitine carbon skeleton with four six-membered rings and two five-membered rings. The five-membered rings adopt envelope configurations and the six-membered N-containing heterocyclic ring displays a chair conformation. Two intra-molecular O-H⋯O hydrogen bonds occur.

(25R)-5a-Spiro-stane-3,12-dione.

The title compound, C(27)H(40)O(4), was obtained from the oxidation of (25R)-3b-hydr-oxy-5a-spiro-stan-12-one (Hecogenin) by Jone's reagent. The mol-ecule contains six alicyclic and heterocyclic rings, all trans-fused, among which four six-membered rings adopt similar chair conformations while two five-membered rings assume an envelope conformation.