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The title compound ethyl(2-amino-4-(3-nitrophenyl)-1,4-dihydro-2H-pyrano[3,2-h]quinolin-3-)carboxylate (C21H17N3O5, Mr=391.38) was synthesized and crystallized. The crystal belongs to triclinic, space group P-↑1 with α=7.886(1), b=9.896(2), c=12.575(3)A,