COc1cccc(-c2ccc(CN3C(C(C)C)C(=O)N(Cc4cn(CCC5OCCO5)nn4)CCS3(=O)=O)cc2)c1OC
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?