N#Cc1c(N2C(=O)[C@@H]3C(CC(N)=O)NC4(C(=O)Nc5ccc(Cl)cc54)[C@@H]3C2=O)sc2c1CCCC2
PSA is a commonly used medicinal chemistry metric for the optimization of a drug's ability to permeate cells. Please predict psa of this molecule.