C[C@]12CC[C@H]3[C@@H](CCC4=CC(=O)CC[C@@]43C)[C@]1(O)CC[C@]2(O)C(=O)CO
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?