1 AEQ Methyl 1-propanoyl-3,4-dihydro-2~{H}-quinoline-6-carboxylate 1.000 2 OY2 Methyl 4-ethyl-1-propanoyl-2,3-dihydroquinoxaline-6-carboxylate 0.810 3 N1E Methyl quinoline-6-carboxylate 0.778 4 OWN Methyl 4-(cyclopropylmethyl)-1-prop-2-enoyl-2,3-dihydroquinoxaline-6-carboxylate 0.739