CC(=O)Nc1ccc2c(COC(=O)[C@H](C)N3C(=O)C4CCCCC4C3=O)cc(=O)oc2c1
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?