Multi-membered N-heterocycles R 0690Synthesis of 2-(1,5,9-Triazabicyclo[7.3.1]tridec-10-en-5-yl)-4-methylthiobutanoic Acid Derivatives. -The title synthesis is studied for the first time. -(KRIVONOGOV, V. P.; SIVKOVA, G. A.; BELAYA, E. A.; GREBEN'KOVA, N. V.; KOZLOVA, G. G.; ABDRAKHMANOV, I. B.; SPIRIKHIN, L. V.; MANNAPOVA, R. T.; Russ.