Oc1ccc2c3c1OC1c4[nH]c5c(c4CC4(O)C(C2)N(CC2CC2)CC[C@]314)CC1(O)C2Cc3ccc(O)c4c3[C@@]1(CCN2CC1CC1)C5O4
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.