COc1ccc2c(c1OC)c(=O)n1c3ccc(OC(C)C(=O)NCCN4CCOCC4)cc3c3ccnc2c31
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?