SEARCH Articles Figures Tables 0-Carbolines synthesis Carbazole synthesis Carbazoles Graebe-Ullmann carbazole-carboline synthesis Carbazoles Graebe-Ullmann carbazole-carboline synthesis Carbazoles, synthesis Carboline Carboline synthesis Carbolines Graebe Graebe-Ullmann carbazole synthesis Graebe-Ullmann carbazole-carboline synthesis Graebe-Ullmann carbazole-carboline synthesis Graebe-Ullmann synthesis Ullmann synthesis