CCn1c2ccc(C(=O)CCCN(C)C)cc2c2cc(C(=O)CCCN(C)C)ccc21.O=C(O)/C=C/C(=O)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?