COc1ccc(-c2nc3c(c4c2C[C@H](c2ccccc2)OC4)CN(S(=O)(=O)c2ccc(C#N)cc2)CC3)c(C)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?