COC(=O)c1ccc2c(c1)s/c(=N/C(=O)c1ccc(S(=O)(=O)N3CCCCC3)cc1)n2C
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?