上游原料
methyl 3,4-dimethoxy-2-furoate3,4-dimethoxy-2-furonitrile2-bromo-3,4,5-trimethoxy-2,5-dihydro-2-furancarbonitrile4,5-dimethoxy-3-pyridinyl acetate3-hydroxy-4,5-dimethoxy-2-pyridinecarbonitrile3-(benzyloxy)-6-bromo-4,5-dimethoxy-2-pyridinecarbonitrileethyl 1-(tributylstannyl)vinyl ether; tributyl(1-ethoxyvinyl)stannane6-acetyl-3-(benzyloxy)-4,5-dimethoxy-2-pyridinecarbonitrile3-(benzyloxy)-6-(2-bromoacetyl)-4,5-dimethoxy-2-pyridinecarbonitrile4-(2-methyl-1,3-dioxolan-2-yl)butanethioamide3-(benzyloxy)-4,5-dimethoxy-6-[2-[3-(2-methyl-1,3-dioxolan-2-yl)propyl]-1,3-thiazol-4-yl]-2-pyridinecarbonitrile3-(benzyloxy)-4,5-dimethoxy-6-[2-[3-(2-methyl-1,3-dioxolan-2-yl)propyl]-1,3-thiazol-4-yl]-2-pyridinecarboxamide3-(2-methyl-1,3-dioxolan-2-yl)-1-propanol4-(2-methyl-1,3-dioxolan-2-yl)butanenitrile
