COc1cc2c(cc1OC)C(=O)C1(C2)[C@H](c2ccccc2)C2C(=O)c3cc(OC)c(OC)cc3C2[C@H]1c1ccccc1
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?