C[C@H]1CN([C@H](C)CO)C(=O)c2cccc(NC(=O)C3CCCCC3)c2O[C@@H]1CN(C)Cc1ccc(C(=O)Nc2ccccc2N)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.