CCc1c(O)c2c(c(O)c1C(C)=O)C(=O)c1c(cc(O)c(C(=O)O)c1C(=O)O)C2=O
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?