N=c1c2c3n(c4c(=O)n(-c5ccccc5)c(=S)n(c(=O)n1-c1ccccc1)c24)CCCCC3
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?