O=C1c2ccccc2-c2c1c(-c1ccccc1)c1n2C2(C(=O)c3ccccc3C2=O)C2C(=O)N(c3ccccc3)C(=O)C12
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?