CCC(Sc1nc2cc(OC)c(OC)cc2c(=O)n1CCc1ccc(S(N)(=O)=O)cc1)C(=O)NCCOC
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?