Electron Ionization Mass Spectra of Organophosphorus Compounds. Part III: Mass Spectrometric Fragmentation of Diethyl Spiro[Pyrimidino[5,3′][1,2]Oxazole] Phosphonate, Diethyl (Oxazolo[5,4-D]Pyrimidine-4,6-Dione)Phosphonate, and Diethyl (Pyrimidino[4,5-B][1,4]Oxazine)Phosphonate Derivatives

Mounir A. I. Salem Department of Chemistry, Faculty of Science, Ain Shams University, Abbasia, Cairo, Egypt

Wafaa M. Abdou Chemical Industries Division, National Research Centre, Dokki, Giza, Egypt

Tarik E. Ali Department of Chemistry, Faculty of Education, Ain Shams University, Roxy, Cairo, Egypt

Azza A. Kamal Chemical Industries Division, National Research Centre, Dokki, Giza, Egypt

Reham F. Barghash Chemical Industries Division, National Research Centre, Dokki, Giza, Egypt

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Electron Ionization Mass Spectra of Organophosphorus Compounds. Part III: Mass Spectrometric Fragmentation of Diethyl Spiro[Pyrimidino[5,3′][1,2]Oxazole] Phosphonate, Diethyl (Oxazolo[5,4-D]Pyrimidine-4,6-Dione)Phosphonate, and Diethyl (Pyrimidino[4,5-B][1,4]Oxazine)Phosphonate Derivatives

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Electron Ionization Mass Spectra of Organophosphorus Compounds. Part III: Mass Spectrometric Fragmentation of Diethyl Spiro[Pyrimidino[5,3′][1,2]Oxazole] Phosphonate, Diethyl (Oxazolo[5,4-D]Pyrimidine-4,6-Dione)Phosphonate, and Diethyl (Pyrimidino[4,5-B][1,4]Oxazine)Phosphonate Derivatives

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