CC(=O)OCC1OC(N2C(C)=C(C(C)=O)C(c3ccc(Cl)cc3)C(C#N)=C2S)C(OC(C)=O)C(OC(C)=O)C1OC(C)=O
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.