O=C(NN1C(=O)/C(=C/c2ccc(Cl)cc2)N=C1c1ccccc1)c1c(Cl)c(Cl)c(Cl)c(Cl)c1-c1nc2ccccc2[nH]1
Drug-like molecules usually have no more than 5 Hydrogen bond donor. How many hydrogen bond donor does the molecule have?