O=C(NCCN1C(=O)S/C(=C/c2cccnc2)C1=O)C1=NN(c2ccccc2)C(=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?