Development and validation of spectrophotometric methods for estimation of arrhythmias drug-dronedarone hydrochloride in pure and dosage forms oleh Ragaa El Sheikh, Ayman A. Gouda, Ahmed A. Ghazy, Nesma M. Jumaa, Noha E.M. Elsaify, Nehal S.A. Soliman, Asmaa El Sayed, Ahmed H. Moustafa, Ahmad O. Babalghith, Ahmed El Sayed, Al-Sayed M．Abd El-Majeed