O=c1[nH]c2cc([N+](=O)[O-])c(Nc3c4ccccc4nc4ccccc34)c([N+](=O)[O-])c2[nH]1
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?