relation: http://publicatio.bibl.u-szeged.hu/32140/ title: Electron impact ionization mass spectra of some substituted dipyrido[1,2-a:4,3-d]pyrimidinones creator: Maki Esa creator: Pihlaja Kalevi creator: Huber Imre creator: Fülöp Ferenc creator: Bernáth Gábor creator: Vainiotalo Pirjo subject: 03.02. Klinikai orvostan description: The electron impact ionization mass spectra of dipyrido [1,2-a:4,3-d] pyrimidinones are strongly influenced by the degree of aromaticity of the fused rings. The molecular ions of the compounds are fairly stable. The main routes of fragmentation involve formation of the [M - H]+ ion and loss of substituents, H2CN., CO and alkyl radicals. date: 1993 type: Folyóiratcikk type: PeerReviewed format: text identifier: http://publicatio.bibl.u-szeged.hu/32140/1/aok_klny_428_93.pdf identifier: Maki Esa; Pihlaja Kalevi; Huber Imre; Fülöp Ferenc; Bernáth Gábor; Vainiotalo Pirjo: Electron impact ionization mass spectra of some substituted dipyrido[1,2-a:4,3-d]pyrimidinones. ORGANIC MASS SPECTROMETRY, 28 (1). pp. 18-22. ISSN 0030-493X (1993) identifier: doi:10.1002/oms.1210280105 relation: https://doi.org/10.1002/oms.1210280105 relation: 28012 language: eng