C[C@H]1CCCCO[C@@H](CN(C)S(=O)(=O)c2ccc(Cl)cc2)[C@H](C)CN([C@H](C)CO)C(=O)c2cc(NC(=O)Nc3ccc(F)cc3)ccc2O1
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?