COc1cc2c(cc1OC)[C@]13CCN4CC5=CCO[C@@H]6CC(=O)N2[C@@H]1[C@H]6[C@@H]5C[C@H]43
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?