COc1ccc(-c2c3c(=O)n(C)c(=O)n(C)c3c3c(-c4cccc(C)c4)nc4ccccc4n23)cc1
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?