CCCCCC(=O)C(C)C1=Nc2nnc(CCCCCCCc3nnc4n3C(=O)C(C(C)C(=O)CCCCC)=N4)n2C1=O
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?