Noopept water solution and degradation by hydrolysis - how long can it keep?

I really like noopept, however I can't be bothered measuring doses twice a day so I like to put it in a solution of vegetable glycerin and water at a dilution of 10 mg/ 1 ml .

This is great as far as convenience goes, but I haven't been using noopept long and wonder how stable the solution is and if the noopept will break down over time.

Does anyone know how long you can keep noopept in a water based solution before it degrades?

Thanks :)