COc1ccc2c(c1Oc1ccccc1)C13CCN(C)C(C2)C12C=CC(C[C@H]2C(C)(C)O)C3
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?