Cc1c(CC(=O)N2CCN(C(=O)C3COc4ccccc4O3)CC2)c(=O)oc2c(C)c(O)ccc12
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?