2,7-Diaminofluorene 2,7-Fluorenediamine 2,7-Fluoroenediamine 5178-56-3 525-64-4 9H-Fluorene-2,7-diamine 9H-Fluorene-2,7-diamine (9CI) AI3-50463 CCRIS 920 EINECS 208-377-5 FLUORENE-2,7-DIAMINE Fluorene-2,7-diyldiamine NSC 12277