Cc1n[nH]/c(=N\S(=O)(=O)c2ccc(/N=N/c3c(O)c(C(=O)O)cc4ccccc34)cc2)s1
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?