2,2'-Methylenebiphenyl 2,3-Benzindene 84987-80-4 86-73-7 9H-Fluorene AI3-09074 CCRIS 947 Diphenylenemethane EINECS 201-695-5 FLUORENE HSDB 2165 Methane, diphenylene- NSC 6787 o-Biphenylenemethane o-Biphenylmethane