CC1NC(=O)C(N)CNC(=O)C(C2CCNC(=N)N2)NC(=O)/C(=C/NC(N)=O)NC(=O)C(CNC(=O)CC(N)CCCN)NC1=O
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.