COC(CNC(=O)C1CCN(S(=O)(=O)c2ccc3nc4c(c(C(=O)O)c3c2)CC(C)CC4)CC1)OC
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?