99635-24-2 Guanosine, 5-bromo-2'-deoxycytidylyl-(5'-3')-2'-deoxy-, (1R-(1alpha(Z),2beta(1E,3S*),5alpha))- Poly(dG-Br(5)dC) Poly(dG-Br(5)dC).poly(dG-Br(5)dC)