.Alpha.-Methylfluorene-2-acetic acid 2-(9H-Fluoren-2-yl)propanoic acid 2-Fluoren-2-ylpropionic acid 36950-96-6 9H-Fluorene-2-acetic acid, .alpha.-methyl- AIDS-128650 AIDS128650 Cicloprofen NSC293916 SQ 20824