C[C@H](CCc1nc(C#N)c(N)o1)[C@H]1CC[C@H]2[C@@H]3[C@@H](O)CC4C[C@@H](O)CC[C@]4(C)[C@H]3C[C@@H](O)[C@@]21C
Drug-like molecules usually have no more than 5 Hydrogen bond donor. How many hydrogen bond donor does the molecule have?