Really? Then tell us, what did the first self-replicating organism evolve from? You can't answer that because that's like asking what's south of the South Pole.
In the late 60s, Darwinian evolution based textbook for 9th Grade biology, said life arose from a 'primordial soup' and that the environmental conditions, like lightening etc, combined with whatever in the oceans formed the ingrediantd for the origin of life. Even remember seeing a film strip on the subject.
Easy. The chemicals that made it up. Important note: south is a concept.