COc1cccc(NC(=O)c2sc3nc(C)c(C(=O)Nc4ccc(C)cc4C)c(-c4ccc(C)o4)c3c2N)c1
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?