CCOc1ccc(CCN2C(=O)C(=O)N([C@@H](CC(C)C)CN3CCC[C@@H]3CN3C(=O)C(=O)NC[C@@H]3CC(C)C)C[C@@H]2Cc2ccccc2)cc1
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.