CCOC(=O)c1c(C)sc(-c2c(-c3cccc(Cl)c3)[nH]c3c2c(=O)n(C)c(=O)n3C)c1O
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?