2,4-Bis(1-aziridinyl)-5-fluoropyrimidine 2,6-Di(ethyleneimino)-5-fluoropyrimidine 2924-61-0 5-25-12-00030 (Beilstein Handbook Reference) BRN 0523935 Pyrimidine, 2,4-bis(1-aziridinyl)-5-fluoro-