CCN1CCN(CCCNC(=O)c2cnn(-c3ccc(C)cc3)c2C2CCN(C(=O)OC(C)(C)C)CC2)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?