COC1=CC(=O)C2(C=C1OC)OC[C@H]1Oc3c(ccc4c3C=CC(C)(C)O4)C(=O)[C@H]12
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?