Khan MA, Caldas EC. ?CONDENSED BENZOPYRANS VI. 8H-PYRANO[3,2-j]QUINOXALINES. Pakistan Journal of Scientific & Industrial Research [Internet]. 2001 Jun. 18 [cited 2024 May 18];44(3):153-5. Available from: https://v2.pjsir.org/index.php/biological-sciences/article/view/1901