[O-][Cl+3]([O-])([O-])[O-].c1ccc(-c2[nH]c[n+](CC3CO3)c2-c2ccccc2)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?