上游原料
2,6-Dichloro-3-nitropyridineDiethyl ethoxymethylenemalonate; Diethyl 2-(ethoxymethylene)malonateN-ethoxycarbonylpiperidine; Ethyl 1-piperazinecarboxylate; N-Ethoxycarbonyl piperazine; N-Carbethoxy piperazine6-Chloro-2-(4-ethoxycarbonyl-1-piperazinyl)-3-nitropyridine; Ethyl 4-(6-chloro-3-nitro-2-pyridinyl)-1-piperazinecarboxylateEthyl 4-(6-amino-3-nitro-2-pyridinyl)-1-piperazinecarboxylate; 6-Amino-2-(4-ethoxycarbonyl-1-piperazinyl)-3-nitropyridineethyl 4-[6-(acetamido)-3-nitro-2-pyridinyl]-1-piperazinecarboxylateEthyl 4-[6-(acetamido)-3-amino-2-pyridinyl]-1-piperazinecarboxylate; 3-Amino-6-acetamido-2-(4-ethoxycarbonyl-1-piperazinyl)pyridine3-Methyl-1-nitrobutane; Isoamyl nitrite6-acetamido-2-(4-ethoxycarbonylpiperazinyl)-3-pyridine diazonium tetrafluoroborate; 6-Acetamido-2-[4-(ethoxycarbonyl)pipderazin-1-yl]pyridin-3-yldiazonium tetrafluoroborate6-acetamido-2-(4-ethoxycarbonylpiperazinyl)-3-fluoropyridine; Ethyl 4-[6-(acetamido)-3-fluoro-2-pyridinyl]-1-piperazinecarboxylateethyl 4-(6-amino-3-fluoro-2-pyridinyl)-1-piperazinecarboxylateN-[2-(4-EthoxycarbonyI-1-piperazinyl)-3-fluoro-6-pyridinyl]aminomethylenemalonate; Diethyl 2-[([6-[4-(ethoxycarbonyl)-1-piperazinyl]-5-fluoro-2-pyridinyl]amino)methylene]malonateEthyl 7-(4-ethoxycarbonyl-1-piperazinyl)-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylate; Ethyl 7-[4-(ethoxycarbonyl)-1-piperazinyl]-6-fluoro-4-oxo-1,4-dihydro[1,8]naphthyridine-3-carboxylateEthyl 7-[4-(ethoxycarbonyl)-1-piperazinyl]-1-ethyl-6-fluoro-4-oxo-1,4-dihydro[1,8]naphthyridine-3-carboxylate; Ethyl 7-(4-ethoxycarbonyl-1-piperazinyl)-1-ethyl-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylate
