ETHYL2-CHLORO-8-EHTYL-5,8-DIHYDRO-5-OXOPYRIDO(2,3-D)PYRIMUIDINE-6-CARBOXYLATE;Ethyl2-chloro-8-ethyl-5,8-dihydro-5-oxopyrido[2,3-d]pyrimuidine-6-carboxylate;Ethyl 2-chloro-8-ethyl-5,8-dihydro-5-oxopyrido[2,3-d]pyrimidine-6-carboxylate
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