COc1ccc(C(c2ccccc2)(c2ccc(OC)cc2)N2C(=O)NC3C(CCCCC(=O)NCCCCCCOP(OCCC#N)N(C(C)C)C(C)C)SCC32)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.