Cc1cc2c(c(=O)n1Cc1ccccc1)[C@H]1O[C@](CCCCN3C(=O)c4ccccc4C3=O)(Cc3ccccc31)O2
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?