CC(C)(C)OC(=O)N1CCCC1C(=O)NCCNc1ccc(NCCNC(=O)C2CCCN2C(=O)OC(C)(C)C)c2c1C(=O)c1ccccc1C2=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.