CN(C)[C@@H](COC(C)(C)C)c1nnc([C@H](Cc2ccc(OC(C)(C)C)cc2)NC(=O)C2CCN(C(=O)OC(C)(C)C)CC2)o1
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.