O=C(O)C(Cc1c[nH]c2ccccc12)N1C(=O)C2C3c4ccccc4C(c4ccccc43)C2C1=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?