CC(=O)OCC(OC(C)=O)C(OC(C)=O)C(/C=N\Nc1nc2ccccc2c(=O)[nH]1)=N\Nc1nc2ccccc2c(=O)[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?