CC(C)CC1C(=O)NCCC(NC(=O)C(Cc2ccc(OC(C)(C)C)cc2)NC(=O)OC(C)(C)C)C(=O)NC(Cc2ccccc2)C(=O)NC(Cc2ccccc2)NC1=O
Hydrogen bond acceptor is the chemical compound which contains the lone electron pairs that participate in the hydrogen bond formation. This compound should contain a more electronegative atom (more electronegative than hydrogen) with lone electron pairs. Then it can attract protons from a donor. Moreover, the electronegative atoms usually involved in hydrogen bonding are oxygen, nitrogen and fluorine. How many hydrogen bond acceptors does the molecule contain?