C=C1C(C)C2C(Cc3ccccc3)NC(=O)C23C(OC(C)=O)/C=C/C(C)(O)C(=O)C(C)C/C=C/C3C1O
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.