CCOC(=O)C1=C(N)n2c(s/c(=C/c3ccco3)c2=O)=C(C(=O)OC)C1c1ccco1
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?