C[N+]1(C)CCO[C@@](O)(c2ccc(-c3ccc([C@]4(O)C[N+](C)(C)CCO4)cc3)cc2)C1
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?