CC(C)=C1C2CCC1C(C(=O)Nc1sc(C)c(-c3ccc(C(C)C)cc3)c1C(N)=O)C2C(=O)O
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?