HETEROBIFUNCTIONAL COMPOUND HAVING MONODISPERSED POLYETHYLENE GLYCOL IN MAIN CHAIN OR SIDE CHAIN

摘要

The present invention is a heterobifunctional monodispersed polyethylene glycol represented by formula (1). (In the formula, each of X¹ and Y¹ represents an atomic group which contains a functional group that forms a covalent bond by reacting with a functional group that is present in a biologically functional molecule, and the functional group contained in X¹ and the functional group contained in Y¹ are different from each other; R¹ represents a hydrocarbon group having 1-7 carbon atoms, or a hydrogen atom; n represents an integer of 3-72; l represents an integer of 2-72; A¹ represents -L¹-(CH₂)_m1- or -L¹-(CH₂)_m1-L²-(CH₂)_m2-, wherein L¹ represents a specific bond or a single bond, L² represents a specific bond, and each of m1 and m2 independently represents an integer of 1-5; B¹ represents -L³-(CH₂)_m3-, -L³-(CH₂)_m3-L⁴-(CH₂)_m4- or a single bond, wherein L³ represents an amide bond or a single bond, L⁴ represents a specific bond, and each of m3 and m4 independently represents an integer of 1-5; and C¹ represents -L⁵-(CH₂)_m5-, -O-CH₂- or a single bond, wherein L⁵ represents a specific bond or a single bond, and m5 represents an integer of 1-5.)