115812-74-3 8H-Pyrido(3',4':5,6)pyrazino(1,2-a)pyrimidine, 9-ethyl-9,10-dihydro-9-methyl-6-phenyl-, 5-oxide 9-Ethyl-9,10-dihydro-9-methyl-6-phenyl-8H-pyrido(3',4'-5,6)pyrazin(1,2-a)pyrimidine 5-oxide 9-Ethyl-9,10-dihydro-9-methyl-6-phenyl-8H-pyrido(3',4':5,6)pyrazino(1,2-a)pyrimidine 5-oxide SC 44914 SC-44914