CS(=O)(=O)O.O[C@@H](c1nc2ccccc2[nH]1)[C@H](O)[C@H](O)[C@@H](O)c1nc2ccccc2[nH]1
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?