COc1ccccc1-c1c(C(F)(F)F)oc2cc(OC(=O)c3ccccc3[N+](=O)[O-])ccc2c1=O
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?