CCc1c(O)c(O)c(C(C)=O)c2c(O)c(-c3c(C)cc4c(CC)c(O)c(O)c(C(C)=O)c4c3O)c(C)cc12
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?