Vanillin, C8H8O3, packs a lot of chemistry into nineteen atoms: eight carbons, eight hydrogens and three oxygens. The core is a single aromatic six-membered ring, and three different groups hang off it: an aldehyde (-CHO), a phenolic hydroxyl (-OH) and a methoxy ether link (C-O-C). Count the bonds and you get 19 in total: 12 single, 6 aromatic and one double bond, the C=O of the aldehyde.
Every sphere has its element symbol engraved into the surface, so you can tell the three oxygens apart from the carbons without painting anything.
Printing notes: the file comes out small at its native size, so scale it up in your slicer. PLA on any FDM printer is fine; add light supports under the bonds and the lower spheres, and use a fine layer height to keep the letters crisp.
Shared under CC BY-SA 4.0, made by MolGod.
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Vanillin Molecule 3D Model with Engraved Atoms (CAS 121-33-5)
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