C[C@H](CCC(=O)O)[C@H]1CC[C@@H]2[C@H]3CC[C@H]4C[C@H](O)CC[C@@]4(C)[C@@H]3CC[C@@]21C
The quantitative estimate of drug-likeness (QED) is the most commonly used quantitative drug efficacy assessment method. Please predict the molecule's qed.