Determination of deuterium incorporation of new drug donafenib tosilate by two methods of LC-MS with natural isotope abundance correction and 1H NMR relative quantitative method
10.16438/j.0513-4870.2023-0161
- VernacularTitle:LC-MS法结合天然同位素校正和1H NMR相对定量法2种方法测定氘代新药甲苯磺酸多纳非尼的氘代率
- Author:
Yi-wen HUANG
1
;
Yang WU
1
;
Xia-ju CHENG
2
;
Qi XU
1
;
Yan-mei LI
2
;
Ye-fei QIAN
1
Author Information
1. Suzhou Institute for Drug Control, Suzhou 215104, China
2. Jiangsu Key Laboratory of Infection and Immunity, Institute of Biology and Medical Sciences, Soochow University, Suzhou 215127, China
- Publication Type:Research Article
- Keywords:
euterated drug;
onafenib tosilate;
euterium incorporation;
liquid chromatography-mass spectrometry;
isotope distribution;
sup>1H quantitative nuclear magnetic resonance
- From:
Acta Pharmaceutica Sinica
2023;58(10):3082-3089
- CountryChina
- Language:Chinese
-
Abstract:
An LC-MS method with natural isotope abundance correction and a 1H NMR relative quantitative method were established to determine the deuterium incorporation of donafenib tosilate, a new deuterated drug molecule. First, the peak areas of isotopic impurities (non-deuterated and incompletely deuterated impurities) and deuterated drug were recorded through the single ion monitoring (SIM) mode of the established LC-MS method and then corrected in terms of the natural isotope abundance offered by ChemDraw soft, removing the nature isotope interference from 13C, 37Cl, etc. The corrected areas were subsequently used to calculate mol% of isotopologues (D0, D1, D2, D3) and Atom% D, namely, deuterium incorporation. In addition, a 1H qNMR experiment was conducted with the aromatic proton at δ 8.63 and the residual proton of isotopic impurities at δ 2.79 as quantitative peaks. The mixture of DMSO-d6 and D2O (10∶1) was employed as the solvent to change the spin-coupling between the residual proton and active hydrogen so that the residual proton could be measured as the single peak, and the sensitivity was greatly improved. The acquisition parameters were also optimized, and Atom% 1H and the deuterium incorporation were then calculated. The two methods were applied to samples of three commercial batches, and the testing results were almost consistent. Both methods proved accurate, sensitive, fast and independent of standard substances and accurate weighing, which could be applied to the determination of the deuterium incorporation of donafenib tosilate and provide a reference for other deuterated drugs.
