O=C1C(Nc2ccc(S(=O)(=O)Nc3cnc4ccccc4n3)cc2)=C/C(=N\c2ccc(S(=O)(=O)Nc3cnc4ccccc4n3)cc2)c2ccccc21
The donor in a hydrogen bond is usually a strongly electronegative atom such as N, O, or F that is covalently bonded to a hydrogen bond. How many hydrogen bond donors does the molecule have?