CC(C)(C)OC(=O)C[C@H]1C/C=C\C[C@H](CC(=O)N(CCO)Cc2ccccc2)C(=O)N2CCC[C@H]2COC1=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.