Cc1nc(/N=N\c2cc(S(=O)(=O)O)ccc2S(=O)(=O)O)c(COP(=O)(O)O)c(C=O)c1O
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?