CCC(C)C(=O)c1c(O)c(C)c2oc3c(C)c(O)c(C(=O)C(C)CC)c(O)c3c2c1O
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?