Nc1nc(Cl)nc2c1ncn2C1CCC(COP(=O)(O)OP(=O)(O)OP(=O)([O-])O)O1.[Na+]
Molecules with a polar surface area of greater than 140 angstroms squared (Å2) tend to be poor at permeating cell membranes. What's the psa of this molecule?