上游原料
5-[4'-(bromomethyl)[1,1'-biphenyl]-2-yl]-2-trityl-2H-1,2,3,4-tetraazole3-methoxy-2,6-dimethyl-4(1H)-pyridinone2,6-dimethyl-4-[[2'-(1-trityl-1H-1,2,3,4-tetraazol-5-yl)[1,1'-biphenyl]-4-yl]methoxy]-3-pyridinyl methyl ether; 3-methoxy-2,6-dimethyl-4-[[2'-(1-trityl-1H-1,2,3,4-tetraazol-5-yl)[1,1'-biphenyl]-4-yl]methoxy]pyridine
