Continuing our work on the synthesis and investigation of the biological properties of guanidine derivatives of quinoline and tetrahydroquinoline [i], we have synthesized lguanidinomethyl tetrahydroquinoline (I), 6-guanidinomethyltetrahydrocarbazole (II), and 2- guanidinoquinazoline (III), and studied their properties. Compound I was prepared from 4- phenyl-l, 2, 3, 4-tetrahydroquinoline (IV), which in turn was obtained by the reduction of ...