C[C@H]1Cc2c(-c3ccccc3)nc3c(c2CO1)CN(S(=O)(=O)c1ccc(Cl)c2nonc12)CC3
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?