Succinic acid (butanedioic acid) is a dicarboxylic acid that occurs naturally in plant and animal tissues. The chemical is also known as "Spirit of Amber." When it was first discovered, it was extracted from amber by pulverizing and distilling it using a sand bath.

C4H6O4. National Center for Biotechnology Information. PubChem Compound Database; CID=1110, https://pubchem.ncbi.nlm.nih.gov/compound/1110 (accessed July 1, 2018).