This is a molecule of lactic acid and a base to hold it. Created following the instructables linked to below. Follow the instructions and TinkerCAD model to make your own custom molecule.

Make a copy of the molecule base
https://www.tinkercad.com/things/6DdjSScWDsA-molecule-and-stand-template/edit

BI V2.5

No

Yes

.2

30

Molecule:
0.2mm resolution
30% infill
Brim

Base:
0.2mm resolution
15% Infill
no brim or raft

http://www.instructables.com/id/3D-Print-Chemical-Structures/
https://pubchem.ncbi.nlm.nih.gov/
http://3dprint.nih.gov/