Spontaneous generation is an old theory that predated Darwin. All Pasteur proved was that nothing grew in his flask. This does not prove or even support the idea that under the right conditions, the right compounds might form to be able to reproduce. The state of the art today is the RNA World hypothesis. Ribozymes and Riboswitches have been found in nature that are probative for an RNA World theory. The building blocks of RNA are pyrimidine and purine. They have been found embedded in the Murchison Meteorite.
Do you accept this as evidence of panspermia, or that interstellar clouds happened to give a leg up to the precursors of ribonucleic acids?
...incidentally, are the amino acids from the Murchison Meteorite racemic mixtures, or do they prefer one enantiomer over another?
Cheers!