CC(=O)O.O=C(CCN1CCCCC1CCO)Nc1ccc2c(c1)C(=O)c1ccc(NC(=O)CCN3CCCCC3CCO)cc1C2=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?