COC(=O)C/C=C\[C@@H](C)[C@@H](/C=N\OC[C@@H]1O[C@H](c2ccccc2)C=C[C@@H]1Oc1ccc(OC)cc1)OC
Molecules with a polar surface area of greater than 140 angstroms squared (Å2) tend to be poor at permeating cell membranes. What's the psa of this molecule?