Cc1nc(-c2nc(C)c(C(=O)/C=C/c3ccc([N+](=O)[O-])cc3)s2)sc1C(=O)/C=C/c1ccc([N+](=O)[O-])cc1
PSA is a commonly used medicinal chemistry metric for the optimization of a drug's ability to permeate cells. Please predict psa of this molecule.