Deciphering the mysteries of Aconitum pendulum: Unique identification of various processed products and characteristic chemical markers

Aconitum pendulum, a member of the Aconitum genus within the Ranunculaceae family, is known for its remarkable anti-inflammatory, anti-tumor, and analgesic properties. However, the application of Aconitum pendulum in traditional medicine is often restricted by its inherent toxicity, necessitating specific processing methods to ensure safe usage. Tibetan medicine utilizes distinctive processing techniques such as the barley wine, Hezitang, and zanba frying systems to render the herb safe for medicinal use. Despite the known pharmacological importance, scant research exists on how these processing methods affect the phytochemical profile of Aconitum pendulum, indicating a necessity for comparative analysis of the resulting concoctions. In this study, we employed 1H nuclear magnetic resonance (1H NMR) spectroscopy and ultra-performance liquid chromatography coupled with quadrupole time of flight mass spectrometry (UPLC-Q-TOF-MS) to explore the metabolomic variations among different processed products of Aconitum pendulum. Multivariate data analysis techniques, including pattern recognition, allowed us to investigate the intricacies of the compound profiles. To discover signature chemical markers that can differentiate the various processed products, we conducted paired t-tests and generated heat maps highlighting the detected differences. Our integrated analysis of the 1H NMR and UPLC-Q-TOF-MS data revealed distinct chemical signatures unique to each method of Aconitum pendulum processing. By employing chemometric analysis with variable importance in projection (VIP) scores greater than 1.0, and coupled with the statistical rigor of paired t-tests (P