LIFE MOLECULES. “Organic synthesis occurring at the polar regions of the Moon, Mercury and other silicate bodies has also been proposed. There are studies of Galactic cosmic rays-induced synthesis of organic molecules in Titan’s atmosphere, production of oxidants on Europa and the possibility of an aerial biosphere on Venus. The production of O2, H2O2 and other oxidants on Europa’s surface by charged particles accelerated in the Jovian magnetic field has been estimated in an earlier study.”
https://royalsocietypublishing.org/doi/10.1098/rsif.2016.0459