COc1ccc(/N=C2\S/C(=N\C(=N\c3ccccc3)SCc3ccccc3)N(c3ccccc3)\C2=N/c2ccc(OC)cc2)cc1
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?