Noun
a dicarboxylic acid (C4H6O4) active in metabolic processes
Source: WordNetBaltic amber yields on dry distillation succinic acid, the proportion varying from about 3% to 8%, and being greatest in the pale opaque or bony varieties. Source: Internet
Arthrobacter crystallopoietes produces a pigment when grown on 2-pyridone (right) but not when grown on succinic acid (left). Source: Internet
They also include much succinic acid. Source: Internet