COC(=O)C(C(=O)C(=O)NC1=C(Cl)C(=O)c2ccccc2C1=O)c1csc(-n2nc(-c3ccccc3)cc2-c2ccccc2)n1
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.