CCCC(=O)Nc1nc2c(ncn2[C@@H]2O[C@H]3COP(=O)(O)O[C@@H]3[C@@H]2OC(=O)CCC)c(=O)[nH]1
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?