COc1ccc(-c2c3c(=O)n(C)c(=O)n(C)c3c3n2-c2ccccc2NC3c2ccc(O)cc2O)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?