O=[N+]([O-])c1ccc2nc(/C(=N/Nc3ccccc3)C(O)c3ccc(C(O)/C(=N\Nc4ccccc4)c4nc5ccc([N+](=O)[O-])cc5nc4O)cc3)cnc2c1
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?