CC[C@]12c3[nH]c4ccc(OC)cc4c3CCN1C(=O)C(CC(=O)NCCCOC)C[C@@H]2C(=O)N1CCN(C(=O)C2CC2)CC1
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.