CC(C)(C)C(=O)[C@H]1[C@H](c2ccccc2)[C@@]2(N=C(c3ccccc3)OC2=O)C2c3ccccc3C=NN21
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?