COc1ccc(OC)c(C(=O)N(C[C@H]2CC[C@@H]([C@@H]3CC[C@H](CO)O3)O2)C(C(=O)NC(C)(C)C)c2ccc(-c3ccccc3)cc2)c1
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.