COc1cc(Cn2c3c(c4c(C(=O)NCCN(C)C)c(O)ccc42)C(=O)c2ccccc2C3=O)cc(OC)c1
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?