11-(4-Ethoxyphenyl)-2-ethyl-3-(2-methoxyethyl)-3,11-dihydro-4H-pyrimido[5',4':4,5]pyrrolo[2,3-b]quinoxalin-4-one;4H-Pyrimido[5',4':4,5]pyrrolo[2,3-b]quinoxalin-4-one, 11-(4-ethoxyphenyl)-2-ethyl-3,11-dihydro-3-(2-methoxyethyl)-
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