“…To the best of our knowledge, PYR was determined with either MEC or CYC using different analytical methods, such as spectrophotometry (Arayne, Sultana, Siddiqui, Zuberi, & Mirza, 2007; El‐Gindy, 2003; El‐Gindy, Emara, & Mostafa, 2004; Habib, Abdelwhab, Abdelrahman, & Ali, 2016; Sharma, Sharma, Saxena, & Talwar, 1989; Shinde, Sayyed, Chaudhari, Chaware, & Biyani, 2016), HPLC (Al‐Jallad, Al‐Kurdi, Badwan, & Jaber, 1999; Arayne, Sultana, & Siddiqui, 2008; El‐Gindy, Emara, & Mostafa, 2004; Li & Lu, 2005; Mao & Carr, 2001; Nawaz, 2013; Sher et al, 2014), and chemometric/UV methods (El‐Gindy, 2003; El‐Gindy, Emara, & Mostafa, 2004). Moreover, MEC was determined using LC stability‐indicating assay method (LC‐SIAM) in tablets (Peraman, Manikala, Kondreddy, & Yiragamreddy, 2015).…”