CS(=O)(=O)N(Cc1cccc(CN(C(C(=O)O)c2ccccc2)S(C)(=O)=O)c1)C(C(=O)O)c1ccccc1
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?