CC(=O)OC[C@@H]1O[C@H](CCO/N=C(\C)CCN2CCCc3nc(C)c(C)cc32)C=C[C@@H]1OC(C)=O
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?