COc1cc(/C=N/Nc2nc3c(c(=O)n(C)c(=O)n3C)n2Cc2ccccc2)ccc1OC(=O)c1ccco1
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?