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Estimation of Salbutamol, Bromhexine, Guaifenesin, Methyl Hydroxybenzoate and Propyl Hydroxybenzoate in Multicomponent Cough Expectorant Syrup by HPLC. Int. J. Environ. Sci. 2025, 816-848. https://doi.org/10.64252/pzavtm72.