Cc1ccc2c(c1)CC1(C2=O)[C@H](c2ccccc2)C2C(=O)c3ccc(C)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?