COc1cc([C@@H]2c3cc4c(cc3[C@H](OC3OC5COC(C(C)C)OC5C(O)C3O)C3COC(=O)[C@@H]32)OCO4)cc(OC)c1O
Drug-like molecules usually have no more than 5 Hydrogen bond donor. How many hydrogen bond donor does the molecule have?