C#CCOCCOCCOCCNc1nc(N2CCOCC2)nc(N2CCN(C(=O)[C@H](Cc3ccc(O)cc3)n3cc([C@@H](N)CC(C)C)nn3)CC2)n1.Cl
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.