O[C@H]1[C@H](O)[C@@H](Cn2nnc(-c3ccccc3)c2-c2ccccc2)OCO[C@@H]1Cn1nnc(-c2ccccc2)c1-c1ccccc1
Drug-like molecules usually have no more than 5 Hydrogen bond donor. How many hydrogen bond donor does the molecule have?