CCC(=O)O[C@H]1CC[C@H]2[C@@H]3CCC4=C/C(=N/OC(=O)c5cccc6c(=O)c7ccccc7[nH]c56)CC[C@]4(C)[C@H]3CC[C@]12C
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.