COc1ccc(C(=O)Oc2c(C#N)sc3c2c(=O)n(-c2ccccc2)c(=S)n3-c2ccccc2)cc1
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?