It's "common knowledge" that antimatter only differs from matter in its charge, and if left alone, it would behave exactly as matter does. This would infer that atoms of antimatter would form similar chemical bonds as matter does. Two anti-hydrogen and an anti-oxigen would form anti-water, which would behave just as regular water does.
However, was this ever experimentally verified? Were chemical bonds between atoms of antimatter ever observed? If so, were their properties the same as the chemical bonds between regular atoms?
I'm not talking about antiprotons and positrons forming atoms. I'm talkin about anti-atoms forming molecules.