CCCCCCNC(=O)O[C@H]1C[C@H](C(=O)OC)[C@H](C(=O)OC)C2CN(S(=O)(=O)c3ccc(C)cc3)C[C@@]21O
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?