CC(C)(C)OC(=O)NCCCC[C@H](NC(=O)c1[nH]cnc1C(=O)Nc1ccc(CNC(=O)OC(C)(C)C)cc1)C(=O)OC(C)(C)C
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.