What’s the longest chemical formula that spells out a word, but is also an actual chemical formula?

I’m able to come up with “HI”, or hydrogen iodide (which is a real compound). “He” also works, which is just helium.

I’ve tried to use AI to find one, but it was only able to produce CuTe, copper (II) telluride, BiTe, bismuth telluride, and LaTe, lanthanum telluride.

What’s the longest chemical formula that is both valid and spells out a word or phrase?

edit: spelled spell wrong…