CC[C@@H](C)[C@@H]1CN([C@@H](CN2CCC[C@H]2CN2C(N)=NC[C@@H]2Cc2ccccc2)C(C)C)C(=N)N1CCCC1CCCC1
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.