O=C(CCCCCn1c(=O)c2sccc2n(CC(=O)Nc2ccccc2F)c1=O)NCc1ccc2c(c1)OCO2
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?