Compound and labeled biological substance using the same

Abstract

A compound of Formula (1) and a labeled biological substance having the compound. Zand Zrepresent a specific 6-membered ring, and at least one of Zor Zis a benzene ring having a specific substituent at an ortho position with respect to a nitrogen atom to which Lor Lis bonded, or a specific nitrogen-containing 6-membered ring in which a ring-constituting atom located at the ortho position is a nitrogen atom. The compound has at least one structure represented by —(CH—CH—O)—Ron a heterocyclic ring, and has at least one substituent capable of being bonded to a carboxy group or a biological substance at a specific position, and in a case where at least one of Zor Zis the specific nitrogen-containing 6-membered ring, the specific substituents may be bonded to each other to form a ring.