COc1ccc([C@H]2[C@H](C(=O)C(C)(C)C)N3N=Cc4ccccc4C3[C@]23N=C(c2ccccc2)OC3=O)cc1OC
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?