can't read?
Methoxypolyethylene glycol 350 is a polymer similar in structure and nomenclature to polyethylene glycols.
P 0739 (OTTO) Polyethylene glycol monomethyl ether 350 Cas 9004-74-4 - used in a study to investigate synthesis of a new amphiphilic poly(organophosphazene) by stepwise nucleophilic substitution.