COc1ccc(C(=O)C[n+]2ccc3c(c2)nc(-c2cc(OC)c(OC)cc2OC)n3C)cc1.[Br-]
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?