O=C(NC1CCCCC1)C(c1ccc(O)c(O)c1)N(C(=O)Cn1nnc2ccccc21)c1cccc(O)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?