CC[C@]1(c2ccc3c(c2)OCO3)C=[N+]([O-])O[C@H](OC2CCCC2(c2ccccc2)c2ccccc2)[C@@H]1OC(C)=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?