Cc1cc2c(c(C(=O)NCC(=O)N[C@@H](C)C(=O)OCc3ccccc3)c1)Oc1c(cc(C)cc1C(=O)NCC(=O)N[C@@H](C)C(=O)OCc1ccccc1)S2
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.