CCOC(=O)c1c(-n2c(C)cc(/C=C3/C(=O)NC(=O)N(CC)C3=O)c2C)sc2c1CCCC2
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?