CC(=O)OC(CCC1(C)OC1COc1ccc(CCNC(=O)c2ccccc2)cc1)C(C)(C)OC(C)=O
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?