Problem with Chem3D 16.0 Save copy as .pdb

Dear Members,

I built a ssDNA polymer in ChemDraw 16.0 and using Chem3D 16.0, I ran MM2 for energy minimization. Upon saving copy as .pdb, COMPND, ATOM, HETATM, and CONECT records are used by Chem3D; all other records in a Protein Data Bank file are ignored. Kindly suggest any method to convert the native .c3xml file to .pdb file without losing any record type.

Thanks in advance