CCC1CN2CCc3cc(OC)c(OC)cc3C2CC1CC1c2cc(OC)c(OC)cc2CCN1C(=O)C1CCCN1C(=O)OCc1ccccc1
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.