ANTIPARASITIC AGENTS .17. SYNTHESIS OF 2-METHYLMERCAPTO-7-H/PHENYL-1H,6H-PYRIDO[3,4-B]IMIDAZO[4,5-E]INDOLES, 6-(4-OXO-2-THIOQUINAZOLIN-3-YL]-1-H/PHENYL-9H-PYRIDO[3,4-B]INDOLES/8-(4-OXO-2-THIOQUINAZOLIN-3-YL)-1-H/PHENYL-9-H-PYRIDO[3,4-B]-INDOLES AND 6-(2,4-DIOXO-1,3-BENZOXAZIN-3-YL)-1-PHENYL-9H-PYRIDO[3,4-B]INDOLES/8-(2,4-DIOXO-1,3-BENZOXAZIN-3-YL)-1-PHENYL-9-H-PYRIDO[3,4-B]INDOLES AS ANTHELMINTIC AGENTS

2-Methylmercapto-7-H/phenyl-1H,6H-pyrido[3,4-b]imidazo[4,5-e]indoles (11,12), 1-methyl-2-methylmercapto-7-phenyl-1H,6H-pyrido[3,4-b]imidazo[4,5-e]indole (13), 6-(4-oxo-2-thioquinazolin-3-yl)-1-H/phenyl-9H-pyrido[3,4-b]indoles (18,19), 6-(2,4-dioxo-1,3-benzoxazin-3-yl)-1-phenyl-9H-pyrido-[3,4-b]indole (20), 8-(4-oxo-2-thioquinazolin-3-yl)-1-phenyl-9H-pyrido[3,4-b]indole (24) and 8-(2,4-dioxo-1,3-benzoxazin-3-yl)-1-phenyl-9H-pyrido[3,4-b]indole (25) have been synthesized and evaluated for their anthelmintic and antiamoebic activities against Ancylostoma ceylanicum, Nippostrongylus braziliensis, Hymenolepis nana and Entamoeba histolytica. However, none of them shows any significant activity.