CCOC(=O)CCC(NC(=O)Cc1ccc(Nc2nc3cc(F)c(F)cc3nc2C(=O)OCC)cc1)C(=O)OCC
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?