Ojha, K., Adwani, P., & Mathur, N. (2010). A Convenient Synthesis of 1,2,4-Trihalophenothiazine- 3-ones and Their Conversion into (1,4)-Benzothiazino(2,3-b)-Phenothiazines. Asian Journal of Chemistry, 5(1), 89–92. Retrieved from https://asianpubs.org/index.php/ajchem/article/view/24754