N#Cc1cccc(NC(=O)c2ccc(C(=O)O)c(C(=O)c3ccc(C(=O)O)c(C(=O)Nc4cccc(C#N)c4)c3)c2)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?