In this task, you are given a sentence. You are expected to recognize the name of any form of chemical substances. Although there might be several correct answers, you need to write one of them.

Q: Exposure to valproic acid inhibits chondrogenesis and osteogenesis in mid-organogenesis mouse limbs.

A: valproic acid
****
Q: Genetic Insights into Pyralomicin Biosynthesis in Nonomuraea spiralis IMC A-0156.

A: Pyralomicin
****
Q: Ligand binding specificities of the eight types and subtypes of the mouse prostanoid receptors expressed in Chinese hamster ovary cells.

A:
prostanoid
****