COc1ccc(-c2ccc3c(c2)S(=O)(=O)c2cccc(C(=O)NCCOc4ccccc4)c2C3=O)cc1OC
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?