Cn1cnc(C(=O)NCc2ccc(CNC(=O)OC(C)(C)C)cc2)c1C(=O)NCc1ccc(CNC(=O)OC(C)(C)C)cc1
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?