Fused Quinoline Heterocycles III: Synthesis of First Annulated 1,4,5,6,6a-Pentaazabenzo[a]indacenes, 1,3,5,6-tetraazaaceanthrylenes and 5,7,9,11-Tetraazabenzo[a]fluorenes - Mekheimer, Ramadan Ahmed (Synthesis, 2000)