Cc1cccc(-n2c(=O)c3c(c4cc(C)ccc4n3C)n(CC(=O)Nc3ccc(C)cc3C)c2=O)c1
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?