CC[C@@H](C)[C@H](NC(=O)OC(C)(C)C)c1nnc(S(=O)(=O)Cc2cc(C)ccc2C)o1
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?