Oc1ccc(C[C@H]2CNC(=S)N2CC2CCCN2C[C@H](Cc2ccccc2)N2C[C@H](Cc3ccc(O)cc3)N(CCc3ccccc3)C2=S)cc1
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?