CCOc1cc2c(c3c1C(c1ccccc1)N(S(=O)(=O)c1ccc(C)cc1)C3)C(=O)C=CC2=O
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?