COc1ccc(C2=NN(C(=O)CCCC(=O)O)C(c3cn(-c4ccccc4)nc3-c3ccccc3)C2)cc1
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?