CCOC(=O)CCNC(=O)c1cc(C)cc2c1Oc1c(cc(C)cc1C(=O)NCCC(=O)OCC)S2
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?