N=C1/C(=C\c2ccc(OC(=O)c3ccccc3)cc2)C(=O)N=C2SC(N3CCOCC3)=NN12
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?