COC(=O)[C@H]1[C@H](OC)[C@@H](OC(=O)/C=C\c2cc(OC)c(OC)c(OC)c2)C[C@H]2CN3CCc4c([nH]c5cc(OC)ccc45)[C@@H]3C[C@H]21
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?