O=C1C2C3C=CC(C2C(=O)N1C1CCCCC1)C1C2C(=O)N(C4CCCCC4)C(=O)C2C31
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?