CC(C)(C)OC(=O)N[C@@H](Cc1ccccc1)C(=O)N1CC[C@@H](C(=O)N2[C@H]3C[C@H]4CC[C@@]3(CS2(=O)=O)C4(C)C)N1
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?