The Miller-Urey experiment endeavored to set up the initial earth chemical conditions to see if life could arrive without having been there before.
If memory assists, they were able to get a few nucelo-bases and amino acids to form. This permitted them to achieve that if these conditions were present life could spring from nothing... I
t is important to note, however, that their experiment was defective and the conditions they made never actually occurred to our knowledge. They did open the door for other such research and with some current findings on asteroids (namely some nueclo-bases and amino acids) we can deliberate the leeway that the conditions they tested for existed elsewhere in the solar system.
hope it helps
