CN1C(=O)C2(Cc3cn(C45CC67SSC(CO)(C(=O)N6C4Nc4ccccc45)N(C)C7=O)c4ccccc34)SSC1(CO)C(=O)N2C
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?