CC(C)(C)OC(=O)N[C@@H](Cc1ccccc1)C(=O)NC[C@H]1CC[C@H](C(=O)N[C@@H](CCC(N)=O)C(=O)O)CC1
The electronegative atoms usually involved in hydrogen bonding are oxygen, nitrogen and fluorine. How many hydrogen bond acceptors does the molecule contain?