tert-Butyl 6-(1-methoxy-2-methyl-1-oxopropan-2-yl)-3,4-dihydro-1,5-naphthyridine-1(2H)-carboxylate 5g

tert-Butyl 6-(1-methoxy-2-methyl-1-oxopropan-2-yl)-3,4-dihydro-1,5-naphthyridine-1(2H)-carboxylate 5g