CC(C)CCC1(O)O[C@H]2C[C@H]3[C@@H]4CCC5CC(=O)C=C[C@]5(C)[C@H]4CC[C@]3(C)[C@H]2[C@@H]1C
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.