(E)-Methyl 3-(2-((tert-butyldimethylsilyloxy)-methyl)furo[3,2-b]pyridin-6-yl)acrylate(E)-Methyl 3-(2-((tert-butyldimethylsilyloxy)methyl)furo[3,2-b]pyridin-6-yl)acrylate(E)-Methyl 3-(2-((tert-butyldimethylsilyloxy)methyl)furo[3,2-b]pyridin-6-yl)acrylate