4-25-00-02657 (Beilstein Handbook Reference) 4-Chloro-6-ethyleneimino-2-phenylpyrimidine 6-(1-Aziridinyl)-4-chloro-2-phenylpyrimidine 63019-51-2 BRN 0016103 Pyrimidine, 4-chloro-6-ethyleneimino-2-phenyl-