1-Fluorenyl phenyl ketone 15860-31-8 2-Benzoylfluorene 3-07-00-02812 (Beilstein Handbook Reference) 9H-Fluoren-2-ylphenylmethanone BRN 2278067 Ketone, fluoren-2-yl phenyl Methanone, 9H-fluoren-2-ylphenyl-