CC1=C(C(=O)Nc2ccccc2C)C(c2ccc(C)o2)n2c(s/c(=C/c3ccccc3)c2=O)=N1
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?