CN(C)[C@H]1C(O)=C(C(=O)NCN2CCCC2)C(=O)[C@]2(O)C(O)=C3C(=O)c4c(O)cccc4[C@](C)(O)[C@H]3C[C@H]12
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.