The purpose of the present invention is to provide a near infrared light-emitting compound which has an ability to highly specifically binding to Aß, a high permeability through the blood-brain barrier, an ability to quickly disappear from the brain and a high biopermeability. Provided are a compound having a benzoxazole skeleton and an aromatic compound having a dimethylamino group, a dicyanovinyl group, etc. In formula (I), either R1 or R2 is an electron donating group and the other is an electron withdrawing group; X and Y are the same or different and each represents a carbon atom, a nitrogen atom, an oxygen atom or a sulfur atom; and m is an integer of 0 to 5.
MOLECULAR IMAGING PROBES FOR DIAGNOSING CONFORMATION DISEASE