CCN(CC)S(=O)(=O)c1ccc(O)c(NC(=O)c2cc(-c3cc(OC)c(OC)c(OC)c3)nc3ccccc23)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?