Fig. S3.

Complexity of the CHOMg chemical space. (A) The dominance of CHOMg molecules possessing four oxygen atoms compared with the whole CHOMg chemical space for the soluble organic matter of NWA 7325. H/C vs. O/C for NWA 7325 (B), H/C vs. O/C and H/C vs. m/z representations of CHOMg chemical compositions for Novato (C and D), Chelyabinsk (E and F), and Murchison (G and H) meteorite samples illustrate the chemical complexity of their organic extracts. The bubble size represents the relative intensity of the mass peaks. The mass-edited H/C ratio diagram of NWA 7325 is shown in Fig. 2A in the main text.