CP-d(GpG) was purified from DNA hydrolysate by HPLC fractionation utilizing an Aijiren system consisting of a binary pump SL, a G1379B degasser, a G1316B thermostatted column compartment SL, a G1215C diode array SL, a G1367C/ thermostatted high performance autosampler SL, and a G1364C/G B analytical scale fraction collector