CN(C)CCCNC(=O)C[C@H]1C[C@H](C(=O)N2CCOCC2)[C@@]2(C)c3[nH]c4cc(-c5ccco5)ccc4c3CCN2C1=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.