NCCC(=O)N[C@@H](Cc1cc(O)c(O)c(SCC(NC(=O)CC[C@H](N)C(=O)O)C(=O)NCC(=O)O)c1)C(=O)O
Drug-like molecules usually have no more than 5 Hydrogen bond donor. How many hydrogen bond donor does the molecule have?