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https://www.selleckchem.com/pr....oducts/fti-277-hcl.h
After successful validation, this method was applied for the quantification of the selected chemical markers in an in-house decoction and three commercial cough syrups. Among the selected chemical markers, 6-epi-aucubin was the main compound in the calabash decoction, while trans-cinnamic acid and 4-hydroxybenzoic acid were the major compounds in the commercial products. Verbascoside and 6-epi-aucubin were below the limit of quantification in all syrup samples. The proposed method was successfully applied for the analysis of three c