O=c1[nH]c2cc([N+](=O)[O-])c(N/N=C/C=C/c3ccc([N+](=O)[O-])o3)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?