C=C[C@@H]1c2ccccc2N(S(=O)(=O)c2ccc(C)cc2)[C@H](c2ccccc2C(F)(F)F)C1(C#N)C#N
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?