The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: 3,4,5-Trichloropyridine, is researched, Molecular C5H2Cl3N, CAS is 33216-52-3, about Quantitative determination and validation of four ketones in Salvia miltiorrhiza bunge using quantitative proton nuclear magnetic resonance spectroscopy, the main research direction is tanshinone dihydrotanshinone cryptotanshinone Salvia root proton NMR spectroscopy; Salvia Miltiorrhiza Bunge; cryptotanshinone; dihydrotanshinone; qNMR; tanshinone I; tanshinone IIA.SDS of cas: 33216-52-3.
Salvia mltiorrhiza Bunge (SMB) is native to China, whose dried root has been used as medicine. A few chromatog.- or spectrometric-based methods have already been used to analyze the lipid-soluble components in SMB. However, the methodol. of qNMR on the extracts of fresh SMB root has not been verified so far. The purpose of this study was to establish a fast and simple method to quantify the tanshinone I, tanshinone IIA, dihydrotanshinone, and cryptotanshinone in fresh Salvia Miltiorrhiza Bunge root without any pre-purification steps using 1H-NMR spectroscopy. The process is as follows: first, 70% methanol aqueous extracts of fresh Salvia Miltiorrhiza Bunge roots were quant. analyzed for tanshinone I, tanshinone IIA, dihydrotanshinone, and cryptotanshinone using 1H-NMR spectroscopy. Different internal standards were tested and the validated method was compared with HPLC. 3,4,5-Trichloropyridine was chosen as the internal standard Twelve samples of Salvia Miltiorrhiza Bunge were quant. analyzed by qNMR and HPLC resp. Then, the results were analyzed by chemometric approaches. This NMR method offers a fast, stable, and accurate anal. of four ketones: tanshinone I, tanshinone IIA, dihydrotanshinone, and cryptotanshinone in fresh roots of Salvia Miltiorrhiza Bunge.
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Reference:
Bromide – Wikipedia,
bromide – Wiktionary