COc1ccc(N2CCN(CCCNC(=O)C3CCCN(S(=O)(=O)c4c(C)n[nH]c4C)C3)CC2)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?