CC(=O)O[C@H]1[C@@H](OC2CCCC2(c2ccccc2)c2ccccc2)O[N+]([O-])=C[C@@]12COCc1cc3c(cc12)OCO3
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.