H2co2 + H20 -------> Ch4 + O3

Help!

Do you want a word equation? What are your ideas so far - you must know one of them. I'll help you but you have to show you're thinking first.
Here's a tip the first molecule is an acid found in some ants.

Here's a site to help you name carbon containing molecules hydrocarbons

Post up what you work out, and I'll check it :)