CC[C@@H](C)[C@@H]1CN([C@@H](C)CN2CCC[C@H]2CN2C(N)=NC[C@@H]2Cc2ccccc2)C(=N)N1CCCC1CCCC1
The electronegative atoms usually involved in hydrogen bonding are oxygen, nitrogen and fluorine. How many hydrogen bond acceptors does the molecule contain?