O=C1c2ccccc2/C(=N\c2ccc3ccccc3c2)C1(C1=C(c2ccccc2)/C(=N/c2ccc3ccccc3c2)c2ccccc21)c1ccccc1
Drug-like molecules usually have no more than 5 Hydrogen bond donor. How many hydrogen bond donor does the molecule have?