CC(NC(=O)C(NC(=O)OC(C)(C)C)C(C)C)C(=O)N1CCCC1C(=O)NCC(=O)NC(C(=O)NCC(=O)OCc1ccccc1)C(C)C
The electronegative atoms usually involved in hydrogen bonding are oxygen, nitrogen and fluorine. How many hydrogen bond acceptors does the molecule contain?