COc1cc(/C=C2/C[C@H]3[C@@H]4CC=C5C[C@@H](OC(C)=O)CC[C@]5(C)[C@H]4CC[C@]3(C)NC2=O)cc(OC)c1OC
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?