Natraj, K.S. 2018. Analytical Method Development and Validation for the Estimation of Related Substances in Oxybutynin HCl Prolonged Release Tablets by Reverse-Phase High- Performance Liquid Chromatographic: Analytical Method Development and Validation for the Estimation of Related Substances in Oxybutynin HCl Prolonged Release Tablets by Reverse-Phase High- Performance Liquid Chromatographic. International Journal of Pharmaceutical & Biological Archive. 9, 03 (Oct. 2018). DOI:https://doi.org/10.22377/ijpba.v9i03.1659.