O=S(=O)(c1cccc(Cl)c1)N1CCCC(c2nc(O)c3nnn(Cc4ccc5c(c4)OCCO5)c3n2)C1
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?