COc1cc(C(=O)C/C(CCCC(=O)Nc2ccccc2[N+](=O)[O-])=N/NC(=O)c2cc3ccccc3cc2O)ccc1O
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?