CCOC(=O)C(Cc1c(-c2[nH]c3ccccc3c2CC(NC(=O)CNC(C)=O)C(=O)OCC)[nH]c2ccccc12)NC(=O)CNC(C)=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?