CCOC(=O)C1OC(C2(C)OC3(OC4(C=CC3O)OC(C(C)C(=O)C(C)C(O)C(C)CC(C)c3c(Cl)cc(C)c(O)c3C(=O)O)C(C)CC4C)C(C)C2OC)CC1O
Drug-like molecules usually have no more than 5 Hydrogen bond donor. How many hydrogen bond donor does the molecule have?