Cc1c(OC(C)C(=O)N[C@@H](Cc2ccccc2)C(=O)O)ccc2c3c(c(=O)oc12)CCCC3
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?