COc1ccc(OC)c(C2C(C(=O)Nc3ccc(C)cc3C)=C(C)Nc3c(C(=O)Nc4ccc(F)cc4)cnn32)c1
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?