methylene-dimalonic acid

例句：

1. 1. This compound is used in the production of plastics and other materials.
   这种化合物用于生产塑料和其他材料。
2. 2. The chemical properties of this compound are quite unique.
   这种化合物的化学性质非常独特。
3. 3. The synthesis of this compound involves complex reactions.
   合成这种化合物涉及复杂的反应。