Trifluoromethane sulfonic acid 5-(2-ethyl-5,7-dimethyl-imidazo[4,5-b]pyridin-3-yl)-6,7,8,9-tetrahydro-5H-benzocyclo-hepten-2-yl ester 生成 2-Ethyl-5,7-dimethyl-3-(2-tributylstannanyl-6,7,8,9-tetrahydro-5H-benzocyclohepten-5-yl)-3H-imidazo[4,5-b]pyridine