CCCCCCCCCCCCn1c(=O)cc(NCCCC)c2cc3c(NCCCC)cc(=O)n(CCCCCCCCCCCC)c3nc21
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?