O=C1CSC2(CC(/C=C/c3ccccc3Br)=NN2c2cccc(S(=O)(=O)O)c2)N1c1nc2ccccc2s1
Hydrogen bond acceptor: The atom, ion, or molecule component of a hydrogen bond which does not supply the bridging (shared) hydrogen atom. How many hydrogen bond acceptors does the molecule have?