CC1=C(C(=O)Nc2ccc([N+](=O)[O-])cc2)C(c2cccc([N+](=O)[O-])c2)C(C(=O)Nc2ccc([N+](=O)[O-])cc2)=C(C)N1
Drug-like molecules usually have no more than 5 Hydrogen bond donor. How many hydrogen bond donor does the molecule have?