Robuta

https://www.sciencenews.org/archive/nitrogen-tetroxide-found-jupiters-atmosphere
nitrogen tetroxidefound inscience newsjupiteratmosphere
https://everything2.com/title/Nitrogen+Tetroxide%252FHydrazine
The most powerful (in terms of specific impulse) common storable propellant. It is composed of a stoichiometric ratio of hydrazine and nitrogen tetroxide....
nitrogen tetroxidehydrazine