CCc1ccc(Cc2ccc(CC)c(NC(=O)C(=O)Cc3nc4ccccc4nc3C)c2CC)c(CC)c1NC(=O)C(=O)Cc1nc2ccccc2nc1C
Hydrogen bond acceptor is the chemical compound which contains the lone electron pairs that participate in the hydrogen bond formation. How many hydrogen bond acceptors does the molecule contain?