COc1cc(/C=C2/C(=N)N3C(=NC2=O)SN=C3S(C)(=O)=O)ccc1OC(=O)c1ccco1
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?