CC(C)=CCC/C(C)=C\C=C\C(C)=C/C=C/C(C)=C\C=C\C=C(C)/C=C/C=C(C)\C=C\C=C(\C)CCC=C(C)C
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.