O=S(=O)(c1ccc(/N=C2\NC(c3ccc(O)cc3)(c3ccccc3O)c3ccccc32)cc1)c1ccc(/N=C2/NC(c3ccc(O)cc3)(c3ccccc3O)c3ccccc32)cc1
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?