CC1CCC2C(=O)N3C(CCC(C)[C@@H]3c3cccc(N4CCOCC4)c3)C(=O)N2C1c1cccc(N2CCOCC2)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?