HbrewO Should be like H2O where the '2' is subscripted.

In regards to your pre-requisition...

You do realize that subscripted "brew" can not resemble to "2" due to the different number of glyphs and due to the fact that in chemistry that much subscripted glyphs usually indicates a compound for it self and not a molecule? This might not be a common knowledge of chemistry, but visual appearance of your pre-requisition will be inevitably misread or misguiding.

Please advise....

"brew" is not intended to indicate a chemical compound. It is simply a play on words with H2O. since '2' rhymes with 'brew'. HbrewO = H2O.

Good luck ,)