Cc1nc2sc(C(=O)Nc3ccc(F)cc3)c(N)c2c(-c2ccc(Br)cc2)c1C(=O)Nc1ccc(Cl)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?