CN1C[C@@H]2C(c3ccc(C(F)(F)F)cc3)C3(c4ccc(C#N)cc4)CC2(C3)[C@H]1c1ccccc1
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?