CCOC(=O)c1ccc(NC(=O)c2[nH]cnc2C(=O)NCCCNC(=O)c2nc[nH]c2C(=O)Nc2ccc(C(=O)OCC)cc2)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.