CC(C)(C)OC(=O)N1CCC(c2c(C(=O)N3CCN(C4CCCCC4)CC3)cnn2-c2ccccc2)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?