O=C1CN2CCN(CC2)CC(=O)Nc2ccc(cc2)S(=O)(=O)c2ccc(cc2)NC(=O)CN2CCN(CC2)CC(=O)Nc2ccc(cc2)S(=O)(=O)c2ccc(cc2)N1
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.