Cn1c(-[n+]2c(-c3ccccc3)cc(-c3ccccc3)cc2-c2ccccc2)nc2c([N+](=O)[O-])cccc21.[I-]
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?