%0 Journal Article %T Condensed heterotricycles: Pyrido(1,2,3-de)(1,4)benzoxazines, pyrido(1,2,3-ef)(1,5)benzoxazepines and pyrido(1,2,3-fg)(1,6) benzoxazocines %A A Nagana Goud %A K Nagarajan %A R K Shah %A S J Shenoy %A V Ranga Rao %J - %D 1992 %U https://www.ias.ac.in/describe/article/jcsc/104/05/0549-0568