Cc1cc(O)c2c(c1)CC(O)C1=C2C(=O)c2c(O)ccc(OC3CC(O)C(OC4CC(OC5CCC(O)C(C)O5)C(O)C(C)O4)C(C)O3)c2C1=O
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?