CCOC(=O)c1c(SC(=O)c2ccc(OC)cc2)n(-c2ccccc2)c(=S)n(-c2ccccc2)c1=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?