Fluorine containing Bioactive Heterocycles. Investigation of the Reactions of Fluorine containing 3-Hydrazino 5H-1 ,2,4-triazino[5,6-b]indoles with Carbon Disulphide and Synthesis of 2,3-Dihydro-1-thioxo-1 ,2,4-triazolo[3,4-c]-1 ,2,4- triazino[5,6-b] indoles as Antibacterial Agents