CC1C(=O)CCC2[C@]1(C)CCC1[C@]3(C)CC[C@@]4(C)CCC(C)(C)CC4[C@]3(C)CC[C@]21C
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?