CC(=N/N=C/c1ccccn1)/C(C)=N/N=C(C)/C(C)=N/N=C(C)/C(C)=N/N=C(C)/C(C)=N\N=C\c1ccccn1
The electronegative atoms usually involved in hydrogen bonding are oxygen, nitrogen and fluorine. How many hydrogen bond acceptors does the molecule contain?