Determination and Validation of Spectrophotometric Analytical Method for Quantification of Total Flavonoids in the Leaves of Azadirachta Indica A. Juss. (Meliacease) and Optimization of the Ultrasound-Assisted Extraction Conditions. RSD 2022, 11 (3), e9211326135. https://doi.org/10.33448/rsd-v11i3.26135.