COC1=C(C(=O)OC(C)(C)C)[C@]2(C)C(C(=O)OC(C)(C)C)C(OC)=C(C(=O)OC(C)(C)C)[C@]2(C)C1C(=O)OC(C)(C)C
Drug-like molecules usually have no more than 5 Hydrogen bond donor. How many hydrogen bond donor does the molecule have?