O=C1CSC(c2ccccc2[N+](=O)[O-])N1c1ccc(-n2c(-c3ccccc3)nc3ccccc3c2=O)cc1
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?